Special Senses & Otolaryngology

Retinal detachment: recognition and urgent referral

Clinical Overview and When to Suspect Retinal Detachment

— Rhegmatogenous (most common, ~90%): A retinal tear/break allows liquefied vitreous to enter the subretinal space. Driven by posterior vitreous detachment (PVD), myopia, trauma, prior cataract surgery, lattice degeneration.

— Tractional: Fibrovascular membranes pull retina off RPE. Classic in proliferative diabetic retinopathy, sickle cell retinopathy, ROP.

— Exudative (serous): Fluid leaks from choroid without a tear — seen in malignant hypertension, preeclampsia/HELLP, choroidal tumors, Vogt-Koyanagi-Harada, posterior scleritis.

— Sudden monocular flashes (photopsias), new floaters, or a "curtain/shadow/veil" across the visual field

— Sudden painless monocular vision loss

— Recent ocular trauma, recent intraocular surgery, or high myopia (>6 diopters)

— Diabetic with rapid vision change (think tractional)

Board pearl: A patient with floaters/flashes but normal acuity and intact visual field likely has an isolated PVD or retinal tear — still requires same-day ophthalmology referral, because ~10–15% have an associated tear that can progress to detachment if untreated with laser/cryopexy.

Step 3 management: Any new monocular curtain/shadow vision loss = emergent (same-day) ophthalmology consult, NPO, head positioning per ophtho, no eye patching needed, avoid Valsalva. Do not delay for imaging in the ED.

Definition: Separation of the neurosensory retina from the underlying retinal pigment epithelium (RPE), interrupting photoreceptor nutrition from the choroid. Without rapid reattachment, photoreceptors undergo apoptosis within 24–72 hours of macular involvement.

Three mechanistic types — every Step 3 stem hinges on identifying which:

Suspect retinal detachment in any patient with:

Why this is a Step 3 emergency: The clock is the macula. Macula-on detachments need surgery within 24 hours to preserve central vision; macula-off detachments are less time-pressured but still need repair within 7 days.

Presentation Patterns and Key History

— Flashes (photopsias): Brief arcs of light, often peripheral and temporal, worse in dim light. Caused by vitreous traction on retina. Hallmark of evolving PVD ± tear.

— Floaters: Sudden shower of black specks, "cobwebs," or a single large floater ("fly," "ring"). A new single ring-shaped floater suggests a Weiss ring (annular condensation around optic disc from PVD). A shower of red/black dots suggests vitreous hemorrhage from a torn retinal vessel — high-risk feature.

— Curtain/shadow: Progressive peripheral field defect advancing centrally. The side of the visual field affected is opposite the location of the detachment (superior detachment → inferior field loss).

— Macula-on: peripheral field loss only, central acuity preserved

— Macula-off: central acuity drops abruptly (often to counting fingers or worse)

— High myopia (longer axial length → thinner peripheral retina, lattice degeneration)

— Prior cataract surgery (pseudophakia) or YAG capsulotomy

— Prior retinal detachment in fellow eye (~10% lifetime risk in contralateral eye)

— Recent blunt or penetrating eye trauma, including airbag injuries

— Family history (Stickler, Marfan, Ehlers-Danlos)

— Diabetes with prior vitreous hemorrhage (tractional)

— Pregnancy with severe preeclampsia (exudative)

Key distinction: Migraine aura flashes are typically bilateral, scintillating, zigzag (fortification), last 20–30 minutes, and resolve. Retinal flashes are monocular, brief lightning-like arcs, recurrent, especially in dim light, and persist or progress. Mistaking one for the other is a common board trap and a real-world malpractice scenario.

Board pearl: "Tobacco-dust" sign on slit lamp = pigment cells in anterior vitreous (Shafer sign) — highly predictive of a retinal break in a patient with new PVD symptoms.

Classic symptom triad (pneumonic "FFC"):

Pain is typically absent — retinal detachment is painless. Pain suggests alternative diagnoses (acute angle-closure glaucoma, optic neuritis, scleritis, endophthalmitis).

Vision loss character:

Key historical risk factors to elicit:

Physical Exam Findings and Bedside Assessment

— Macula-on: near-normal acuity

— Macula-off: severe reduction — count fingers, hand motion, or light perception

— Present in large or macula-off detachments

— Swinging flashlight test: affected pupil dilates when light swings to it

— A new monocular RAPD with painless vision loss = retinal or optic nerve pathology until proven otherwise

— Often lower in the affected eye (by 4–5 mmHg) due to subretinal fluid altering aqueous dynamics

— Markedly elevated IOP suggests alternative diagnosis (angle closure)

— Loss of red reflex over detached area

— Gray, billowing, "parachute-like" retinal folds

— Retinal vessels appear elevated and may follow undulations

— Tear visible as horseshoe-shaped break with red choroid underneath

CCS pearl: On a CCS case with "flashes, floaters, curtain over vision," your first orders should be: visual acuity, pupillary exam, IOP, bedside ocular ultrasound, urgent ophthalmology consult. Do NOT order CT head first — that wastes the clock and the simulated patient deteriorates.

Board pearl: A patient who reports symptoms "improve when lying flat" or "the curtain seems to lift when I tilt my head" supports a fluid-shifting bullous detachment — strongly suggestive of rhegmatogenous RD and a feature that distinguishes it from stroke-related field cuts.

Visual acuity (each eye independently, with correction):

Confrontation visual fields: A reproducible peripheral field cut corresponding to the detachment quadrant is highly suggestive. Document by quadrant.

Pupils — relative afferent pupillary defect (RAPD):

Intraocular pressure (IOP):

Slit lamp / anterior segment: Usually unremarkable. Look for Shafer sign (pigment in anterior vitreous), vitreous hemorrhage obscuring red reflex.

Direct ophthalmoscopy (ED-level exam after dilation if pupils not needed for neuro monitoring):

Point-of-care ocular ultrasound (POCUS): Increasingly central to ED diagnosis — see imaging chunk.

Diagnostic Workup — Initial Bedside Evaluation

— High-frequency linear probe (7.5–10 MHz), copious gel, closed eyelid, low gain to avoid artifact

— Retinal detachment: Bright, thick, highly reflective hyperechoic membrane in the posterior vitreous, tethered at the optic disc and ora serrata, with limited mobility on kinetic exam (ask patient to move eye)

— Posterior vitreous detachment: Thin, less reflective, more mobile membrane, not tethered to the optic disc

— Vitreous hemorrhage: Diffuse low-level echoes in vitreous cavity; "washing machine" swirl on kinetic exam

— Sensitivity in ED hands: ~90–97%; specificity ~85–95% with training

— Glucose/A1c if tractional detachment suspected (new diabetic vitreous hemorrhage)

— BP if severe hypertension on triage — rules in hypertensive exudative RD

— Pregnancy test in women with eclamptic features

— Coagulation studies only if anticoagulated and surgery planned

Step 3 management: When ophthalmology is not immediately available (rural ED, after hours), POCUS confirming retinal detachment is sufficient to mobilize emergent transfer. Do not delay transfer waiting for in-person ophtho if the nearest consultant is hours away — call, transmit images, and ship.

Board pearl: CT and MRI have no routine role in acute retinal detachment workup. CT is appropriate only when open globe or intraocular foreign body is suspected (then no POCUS — pressure on globe contraindicated).

The diagnosis of retinal detachment is fundamentally clinical and confirmed by ophthalmologic dilated fundus exam — but in the ED, several bedside tools rapidly support the suspicion and triage urgency.

Point-of-care ocular ultrasound (POCUS):

Visual acuity and pupillary exam (already covered) — must be documented before any dilating drops

IOP measurement with tonopen or Goldmann — rules in/out angle closure

Fundus photography or non-mydriatic retinal camera if available — useful for tele-ophthalmology consultation

Labs are NOT routinely indicated for the diagnosis itself but:

Diagnostic Workup — Confirmatory and Specialty Studies

— Indirect ophthalmoscopy with scleral depression allows visualization of the peripheral retina to the ora serrata

— Identifies the detachment, all retinal breaks, lattice degeneration, vitreous traction

— Determines macula-on vs macula-off status — the single most important prognostic feature

— Pharmacologic dilation: tropicamide 1% ± phenylephrine 2.5% (avoid phenylephrine in severe HTN, MAOIs)

— Cross-sectional retinal imaging

— Confirms subretinal fluid and macular status with micron-level resolution

— Critical when clinical exam is equivocal (shallow detachment) or when distinguishing schisis from detachment

— Performed when media opacity (dense vitreous hemorrhage, cataract, corneal opacity) prevents fundus visualization

— Distinguishes RD from choroidal detachment, posterior vitreous detachment, vitreous hemorrhage

— Choroidal detachment: Smooth, dome-shaped, does not extend to optic disc, often with low IOP and recent intraocular surgery

— Imaging for choroidal melanoma (B-scan, MRI orbits)

— VKH workup (lumbar puncture, audiology)

— Hypertensive emergency labs (BMP, urinalysis, ECG)

Key distinction: Retinoschisis = splitting within retinal layers, typically bilateral, inferotemporal, smooth-domed, absolute scotoma on visual field testing (versus relative scotoma in RD). OCT distinguishes definitively. Retinoschisis usually does not require urgent surgery.

Board pearl: A "T-sign" on B-scan ultrasound (thickened sclera with fluid in Tenon space) suggests posterior scleritis — a cause of exudative RD that responds to systemic steroids, not surgery.

Dilated fundus examination by ophthalmology is the gold standard:

Optical coherence tomography (OCT):

B-scan ultrasonography (formal ophthalmic):

Fluorescein angiography: Reserved for exudative detachments to identify leaking sources (choroidal neovascularization, tumors, central serous chorioretinopathy)

Wide-field fundus photography: Used for documentation and referral when transfer is needed

Workup for underlying systemic disease in exudative RD:

Risk Stratification — Macula-On vs Macula-Off

— Central visual acuity preserved (often 20/20–20/40)

— Patient describes peripheral curtain but reads phone/menu normally

— Surgical emergency: repair within 24 hours to prevent macular progression

— Excellent visual prognosis with timely repair (>90% retain 20/40 or better)

— Central acuity already lost (counting fingers, hand motion)

— Repair within 3–7 days is acceptable; emergent overnight surgery does not improve outcomes once macula is off

— Visual prognosis depends on duration of macular detachment: best if <1 week, declining sharply after

— Superior detachments progress faster (gravity pulls fluid down toward macula) — treat sooner

— Inferior detachments are slower

— Giant retinal tears (>90° circumference) — emergent, complex repair

— Proliferative vitreoretinopathy (PVR) — scarring on retinal surface; worsens with delay

— Vitreous hemorrhage obscuring the macula — assume macula-off until proven otherwise

— Superior detachment: supine

— Inferior detachment: head elevated

— Temporal/nasal: lie on opposite side

— Goal: gravity keeps subretinal fluid away from the macula

Step 3 management: When you call ophthalmology with a confirmed RD, the first piece of information they want is central visual acuity (proxy for macular status). "Macula-on, acuity 20/30, superior detachment" = same-night OR. "Macula-off, hand motion, three days of symptoms" = morning OR list.

Board pearl: A patient who reports the curtain started yesterday morning but acuity is still 20/25 = macula-on, hours-to-day window — this is the highest-stakes scenario. Delay = permanent central vision loss. Stems describing this should trigger immediate transfer/consult, never "follow up in clinic."

The single most important triage question after diagnosing RD: Is the macula still attached?

Macula-on detachment:

Macula-off detachment:

Other risk-stratifying features:

Patient positioning while awaiting repair:

Pharmacotherapy and Pre-Operative Management

— NPO in anticipation of surgery

— Pupillary dilation with tropicamide 1% (rapid, short-acting) — used by ophthalmology, not ED unless instructed

— Antiemetics (ondansetron) to prevent Valsalva-inducing vomiting that worsens detachment

— Cough suppression if active cough (codeine or benzonatate)

— Stool softeners to avoid straining

— Activity restriction: Bed rest with positioning per ophthalmology

— No eye patch needed — the retina is detached internally; external pressure does not help

— Coordinate with ophthalmology and prescribing service

— Warfarin/DOACs often continued through scleral buckle/vitrectomy if INR therapeutic

— Aspirin typically continued

— Bridge only if mechanical valve or recent VTE

— VKH, posterior scleritis: High-dose systemic corticosteroids (prednisone 1 mg/kg/day) ± immunomodulators

— Choroidal neovascularization: Intravitreal anti-VEGF (bevacizumab, ranibizumab, aflibercept)

— Malignant hypertension–driven exudative RD: Aggressive but controlled BP reduction (avoid >25% drop in first hour)

Board pearl: Topical glaucoma drops (timolol, brimonidine) may be needed if IOP rises post-procedure, but do not initiate them prophylactically in the ED. Beta-blocker drops can cause systemic bradycardia/bronchospasm — screen for asthma and AV block before use.

Retinal detachment is fundamentally a surgical disease — there is no pharmacologic cure for rhegmatogenous or tractional RD. Medications serve adjunctive roles.

Pre-operative ED/ward management:

Pain control: Acetaminophen first-line. RD is typically painless; significant pain warrants reassessment for another diagnosis.

Anticoagulation management:

Exudative detachment pharmacology (the exception):

Tractional detachment in diabetics: Pre-operative intravitreal anti-VEGF (e.g., bevacizumab 1–2 days before vitrectomy) reduces intraoperative bleeding from neovascular fronds.

Procedures — Surgical Repair Modalities

— Office-based or OR procedure for simple, superior detachments with a single break in the superior 8 clock hours

— Inject expansile gas (SF6 or C3F8) into vitreous cavity; gas bubble tamponades the break

— Followed by laser or cryopexy to seal the break

— Patient must maintain head positioning for days to keep bubble against the tear

— No air travel while gas bubble present (expansion at altitude causes acute angle closure — can blind)

— Success rate ~70–80%

— Silicone band sutured externally around the globe, indenting the sclera inward to relieve vitreous traction on the break

— Combined with drainage of subretinal fluid and cryopexy

— Preferred in young phakic patients, inferior detachments, multiple breaks

— Induces myopia (the buckle elongates the eye)

— Vitreous removed via three small sclerotomies, subretinal fluid drained internally, breaks treated with endolaser, tamponade with gas or silicone oil

— Preferred for pseudophakic eyes, posterior breaks, giant tears, vitreous hemorrhage, PVR, tractional RD

— Silicone oil used for complex/recurrent cases; requires later removal

— May be combined with scleral buckle ("buckle-vit") in complex cases

Step 3 management: Counsel patients pre-op that single-procedure anatomic success is ~85–90%, but ~10–15% require reoperation. Final visual acuity depends primarily on pre-operative macular status and duration, not on technique. Pseudophakia + new RD = vitrectomy is usually preferred.

Board pearl: Any patient with intraocular gas bubble must wear a green wristband and avoid air travel, high-altitude driving, and nitrous oxide anesthesia until the bubble resorbs (SF6: ~2 weeks; C3F8: ~6–8 weeks).

Three primary surgical approaches; choice depends on detachment type, location, complexity, and surgeon preference:

1. Pneumatic retinopexy:

2. Scleral buckle:

3. Pars plana vitrectomy (PPV):

Tractional RD (diabetic): PPV with membrane peeling; sometimes combined with panretinal photocoagulation.

Exudative RD: No surgery — treat underlying cause.

Retinal tear without detachment: Office-based laser photocoagulation or cryopexy — prevents progression to detachment.

Special Populations — Elderly and Comorbid Disease

— Posterior vitreous detachment is age-related; cumulative lifetime RD risk rises sharply after age 60

— Pseudophakia (post-cataract surgery) is the dominant risk factor in this group — RD risk ~1% in first decade post-surgery

— Often present with macula-off detachment because peripheral curtain is missed in those with baseline poor vision, dementia, or living alone

— Surgical tolerance: most procedures done under local/MAC anesthesia — well tolerated even in frail patients

— Most ophthalmic surgeries (vitrectomy, scleral buckle, pneumatic retinopexy) can proceed on aspirin and often on warfarin/DOACs

— Hold decisions individualized; bridging rarely needed

— Do not stop anticoagulation reflexively in patients with AF, mechanical valves, or recent VTE without weighing thromboembolic risk

— Higher risk of tractional RD from proliferative diabetic retinopathy

— Glycemic control optimization perioperatively; avoid rapid glucose swings

— Increased risk of recurrence and PVR

— Coordinate insulin dosing for NPO status pre-op

Step 3 management: In an elderly patient with AF on apixaban presenting with macula-on RD, the correct answer is proceed with urgent surgery, continue apixaban or hold one dose per ophtho preference — NOT bridge with heparin and delay surgery. Delay risks macula-off conversion.

Board pearl: New RD in the fellow eye occurs in ~10% of patients over their lifetime — counsel every patient post-repair about symptoms and the need for prompt return.

Elderly patients (>65):

Anticoagulation in elderly:

Diabetic patients:

Renal impairment: No specific renal dose adjustments for typical pre/post-op meds (acetaminophen, ondansetron). Avoid NSAIDs if eGFR <30.

Hepatic impairment: Acetaminophen dose-cap (≤2 g/day in significant cirrhosis). General anesthesia rarely required; topical/local preferred.

Patients on tamsulosin or other alpha-1 blockers: Intraoperative floppy iris syndrome (IFIS) — alert surgeon; does not preclude surgery but changes technique.

Special Populations — Pediatrics, Pregnancy, and Genetic Syndromes

— Causes differ from adult: trauma (most common — sports, abuse), retinopathy of prematurity (ROP), familial exudative vitreoretinopathy (FEVR), Stickler syndrome, Marfan syndrome, Coats disease

— Often diagnosed late because young children do not report symptoms; presents as strabismus, leukocoria, or amblyopia detected on screening

— Non-accidental trauma: Bilateral retinal hemorrhages with retinoschisis in infants = abusive head trauma until proven otherwise — mandatory reporting

— Surgical repair more challenging; higher PVR rates; amblyopia management critical post-repair

— Exudative RD in severe preeclampsia/eclampsia and HELLP — typically bilateral, resolves with BP control and delivery; no surgery needed

— Visual symptoms in pregnancy (scotomas, blurring) = immediate preeclampsia workup: BP, urine protein, LFTs, platelets, CBC

— Rhegmatogenous RD in pregnancy is rare; can be repaired safely with local anesthesia and avoidance of teratogenic medications

— Central serous chorioretinopathy flares in pregnancy — observation usually sufficient

Board pearl: A pregnant patient at 34 weeks with BP 170/110, headache, and "spots in my vision" with bilateral serous retinal detachments on exam = severe preeclampsia with end-organ damage → admit, magnesium for seizure prophylaxis, antihypertensives, plan delivery. The retina re-attaches once she delivers.

Step 3 management: Suspected abusive head trauma in an infant with retinal hemorrhages requires mandatory CPS report, skeletal survey, head imaging, ophthalmology, and child protection team consult — do not discharge.

Pediatric retinal detachment (rare but high-stakes):

Stickler syndrome: Most common inheritable cause of pediatric RD. COL2A1/COL11A1 mutations. Triad: midface hypoplasia, sensorineural hearing loss, early-onset arthritis. All Stickler patients need lifelong dilated exams and prophylactic laser to lattice lesions is debated.

Marfan syndrome: Ectopia lentis, high myopia, axial elongation → RD risk. Annual dilated fundus exam.

Pregnancy:

Sickle cell disease: Proliferative sickle retinopathy → tractional RD; HbSC genotype higher risk than HbSS. Screen with annual dilated exam starting age 10.

Complications and Adverse Outcomes

— Progression to total retinal detachment within days to weeks

— Permanent visual loss as photoreceptors degenerate

— Phthisis bulbi: End-stage shrunken, non-functional eye — irreversible

— Chronic detachment can lead to neovascular glaucoma, cataract, hypotony

— Proliferative vitreoretinopathy (PVR): Most common cause of surgical failure; scar tissue contracts retina, causing redetachment. Risk factors: large breaks, vitreous hemorrhage, multiple surgeries, delayed repair. Treatment: repeat vitrectomy with membrane peel.

— Recurrent/new retinal break: ~10–15% require reoperation

— Cataract: Nearly universal after vitrectomy in phakic patients within 1–2 years

— Elevated IOP / steroid response / silicone oil glaucoma

— Endophthalmitis (rare, ~0.05%): pain, hypopyon, vision loss days post-op — emergency

— Choroidal hemorrhage intraoperatively

— Diplopia from scleral buckle disturbing extraocular muscles

— Induced myopia from scleral buckle

— Anterior segment ischemia (rare, with 360° encircling band)

— Macula-on RD repaired within 24 hours: ~90% achieve 20/40 or better

— Macula-off RD repaired within 1 week: ~50–60% achieve 20/40 or better; central acuity often permanently reduced

— Macula-off RD repaired >1 month: poor visual prognosis even with anatomic success

— Driving restrictions if binocular vision impaired

— Depth perception loss with monocular vision

— Increased fall risk in elderly

— Occupational implications (pilots, professional drivers, surgeons)

Board pearl: Sympathetic ophthalmia — bilateral granulomatous uveitis after penetrating trauma or surgery in one eye — can cause vision loss in the contralateral "good" eye weeks to years later. Rare (<0.5%) but devastating; treat with systemic steroids/immunosuppression.

Key distinction: Post-vitrectomy "shadow" in inferior field may represent gas bubble (resolves as gas absorbs) versus recurrent detachment (persistent, worsening) — distinguish by serial OCT and exam. Don't reassure prematurely.

Untreated retinal detachment outcomes:

Surgical complications:

Visual outcomes:

Functional consequences:

When to Escalate Care — Consultation and Disposition

— New monocular vision loss with curtain/shadow

— New peripheral field defect

— Macula-on RD on exam or POCUS

— Acute PVD with vitreous hemorrhage (high-risk for tear)

— Trauma with vision change

— Pediatric suspected RD

— Confirmed macula-off RD already several days old (timing per ophtho)

— Isolated PVD with normal exam, no hemorrhage — needs confirmatory dilated exam within 1–2 weeks; sooner if symptoms worsen

— New floaters/flashes without confirmed pathology on ED exam

— Confirmed RD by exam or POCUS

— Open globe injury

— Suspected endophthalmitis

— Communicate visual acuity, macular status if known, time of symptom onset, and patient positioning to receiving facility

— Polytrauma with associated RD

— Severe preeclampsia with serous RD

— Hypertensive emergency with exudative RD

— Endophthalmitis post-op

— Sickle cell vaso-occlusive crisis with RD

— Endocrinology for tight glycemic control in tractional RD

— Rheumatology for VKH or posterior scleritis

— Oncology for choroidal melanoma

— Maternal-fetal medicine for preeclamptic RD

CCS pearl: On the simulated case, when the patient has new monocular curtain vision loss, your consult order is "Ophthalmology — emergent." Advancing the clock without consulting is the most common CCS error on this topic. After consult, advance time in 30-minute increments, not hours.

Step 3 management: A community ED without ophthalmology at 2 AM with a macula-on RD = call the nearest tertiary center, transfer by ground ambulance, NPO, antiemetic, position per ophtho instruction. Do not wait until morning.

Every suspected retinal detachment requires ophthalmology involvement; the question is how urgently and where.

Same-day emergent ophthalmology consult (call, do not refer to clinic):

Urgent (within 24–72 hours) ophthalmology referral:

Transfer criteria (if no ophthalmology coverage at your facility):

Inpatient admission is generally not required for uncomplicated RD — most repairs done same-day or next-day as outpatient/ambulatory surgery

Admission warranted for:

Other consultants:

Key Differentials — Other Ocular Causes of Acute Vision Loss

— Flashes and floaters but no field defect, normal acuity, no Shafer sign

— Still requires dilated exam within 1–2 weeks to rule out retinal tear

— ~10–15% have associated tear at presentation

— Same symptoms (flashes, floaters) without curtain

— Treated in office with laser or cryopexy

— If missed, ~30–50% progress to RD

— Sudden onset of floaters described as "ink drop," "red haze," or vision "covered by spider web"

— Vision ranges from minimal change to hand motion

— Causes: PVD with torn vessel, proliferative diabetic retinopathy, retinal vein occlusion, trauma, sickle cell, macroaneurysm

— On POCUS: low-level vitreous echoes that swirl with eye movement

— Often coexists with RD — assume RD until ophthalmology clears

— Painless sudden, profound monocular vision loss (counting fingers or worse) over seconds

— RAPD, cherry-red spot at macula, retinal pallor, "boxcarring" of vessels

— Stroke equivalent — workup carotid Doppler, ECG, echo; consider tPA only in specialized centers within window

— No curtain, no flashes, no floaters

— Variable painless vision loss

— "Blood and thunder" fundus: diffuse hemorrhages, dilated tortuous veins, disc edema

— Risk factors: hypertension, diabetes, hyperviscosity

— Treated with anti-VEGF for macular edema

— Subacute (hours-days) painful vision loss with eye movement

— Central scotoma, color desaturation, RAPD

— Associated with MS — MRI brain/orbits with contrast

Key distinction: CRAO = sudden, complete, painless, no curtain, cherry-red spot. RD = curtain or shadow, progressive, often preceded by flashes/floaters. Both are emergencies but with different time courses and management pathways.

Posterior vitreous detachment (PVD), uncomplicated:

Retinal tear without detachment:

Vitreous hemorrhage:

Central retinal artery occlusion (CRAO):

Central retinal vein occlusion (CRVO):

Optic neuritis:

Macular hole / epiretinal membrane: Gradual central vision distortion (metamorphopsia), not acute curtain.

Key Differentials — Neuro and Systemic Mimics

— "Curtain coming down then lifting" over seconds to minutes, transient

— Embolic — from carotid stenosis, cardioembolism, giant cell arteritis (GCA) in elderly

— Workup: carotid Doppler, ECG, echo, ESR/CRP if >50

— Key distinction: RD curtain is persistent and progressive; amaurosis fugax resolves

— Age >50, headache, jaw claudication, scalp tenderness, polymyalgia symptoms

— Sudden painless monocular vision loss; pale swollen disc

— ESR/CRP elevated; start high-dose steroids immediately before biopsy

— Risk to fellow eye if untreated

— Homonymous hemianopia — bilateral field defect (e.g., right field of both eyes)

— Patient may perceive this as monocular ("can't see out of right side") — careful field testing distinguishes

— Other neuro deficits often present; activate stroke pathway

— Bilateral scintillating scotoma, fortification spectra, lasts 20–30 minutes, followed by headache

— Resolves completely

— Visual symptoms are cortical, hence binocular

— Painful, red eye, halos around lights, nausea/vomiting, fixed mid-dilated pupil, IOP >40

— Vision blurred (not curtained)

— Treat with topical and systemic pressure-lowering, laser iridotomy

— Pain, redness, floaters, vision loss; hypopyon, vitreous cells

— Recent surgery or trauma → endophthalmitis (sight-threatening)

— Normal exam, RAPD absent, inconsistent fields — diagnosis of exclusion

Board pearl: In a patient >50 with new monocular vision loss, always check ESR/CRP and ask about jaw claudication/headache to screen for GCA — missing this can blind the fellow eye within days.

Key distinction: Bilateral simultaneous vision loss = think central (cortex, optic chiasm, bilateral optic nerve), toxic, or systemic (PRES, methanol, GCA). Unilateral vision loss = think eye, retina, or optic nerve. RD is virtually always unilateral.

Amaurosis fugax (transient monocular blindness):

Giant cell arteritis (arteritic AION):

Stroke / occipital infarct:

Migraine with aura:

Acute angle-closure glaucoma:

Posterior uveitis / endophthalmitis:

Functional/non-organic vision loss:

Post-Operative Care, Discharge, and Long-Term Plan

— Head positioning: Strict positioning (face-down, side-lying) for days to 2 weeks depending on bubble location and break site; positioning compliance correlates with success

— No air travel, high altitude, or nitrous oxide until gas bubble resolves (SF6 ~2 weeks, C3F8 ~6–8 weeks) — green medical alert wristband

— Activity: No heavy lifting (>10 lb), no strenuous exercise, no swimming for ~2–4 weeks

— Vision will be poor until gas resorbs — counsel patients in advance

— Antibiotic drops (moxifloxacin or similar) QID for 1 week

— Topical steroid (prednisolone acetate 1%) tapered over 4–6 weeks

— Cycloplegic (atropine or cyclopentolate) for comfort and to prevent posterior synechiae

— Patients on chronic IOP-lowering drops continue as directed

— Acetaminophen first-line

— Brief opioids if needed; avoid NSAIDs early post-op (bleeding risk and minimal benefit)

— Not while gas bubble present (visual obscuration)

— After bubble resolves, when binocular vision adequate per state law

— Risk of fellow-eye RD ~10% lifetime → educate on symptoms, prompt return

— Cataract formation universal after vitrectomy in phakic eyes within 1–2 years → counsel about future cataract surgery

— Continue management of underlying systemic disease (diabetes for tractional, BP for exudative)

— Address modifiable risks: smoking cessation, glycemic control, BP control, sickle cell management

Step 3 management: At discharge from RD repair, the patient needs printed positioning instructions, a wristband indicating intraocular gas, a list of warning symptoms requiring immediate return (new flashes/floaters/curtain, eye pain, decreased vision, redness, discharge), and a clinic follow-up date already scheduled before they leave.

Board pearl: Counsel patients that final visual acuity may continue to improve for 6–12 months post-repair, especially for macula-off detachments. Manage expectations early.

Post-operative restrictions:

Topical medications post-op (typical regimen):

Pain management:

Driving:

Long-term considerations:

Genetic counseling for Stickler, Marfan, FEVR — family screening

Follow-Up, Monitoring, and Counseling

— Day 1 post-op: examine eye, check IOP, confirm retina attached

— Week 1: assess healing, adjust drops

— Week 2–4: confirm gas bubble resolution, taper steroids

— Month 3, 6, 12: long-term outcomes assessment, OCT for macular status

— Lifelong annual dilated exams thereafter; sooner if symptoms recur

— Visual acuity at each visit — primary functional outcome

— IOP — watch for steroid response, silicone oil glaucoma, secondary angle closure

— Dilated fundus exam ± OCT — confirm anatomic reattachment and macular status

— B-scan ultrasound if media opacity persists

— Fellow eye examination — peripheral retinal evaluation for lattice/tears

— Symptoms requiring same-day return: new flashes, sudden new floaters, new curtain or shadow, severe pain, sudden decreased vision, eye redness or discharge

— Fellow eye: ~10% lifetime risk of RD — return for any of the above symptoms in either eye

— Genetic conditions: family screening for first-degree relatives of patients with Stickler, FEVR, Marfan

— Lifestyle: avoid contact sports if monocular vision; sports glasses with polycarbonate lenses for the seeing eye

— Driving: comply with state laws regarding monocular driving

— Occupational counseling: pilots, professional drivers, military personnel may face certification implications

— Low vision services for patients with macula-off RD and permanent reduced acuity

— Occupational therapy, magnifiers, large-print devices, voice-activated tech

— Driving rehabilitation if monocular

— Diabetic: A1c goal individualized, typically <7%; ophthalmology yearly

— Hypertensive: BP <130/80

— Sickle cell: hydroxyurea, transfusion as indicated; ophtho yearly

Board pearl: A patient with prior RD repair who calls reporting new flashes in the fellow eye — bring them in same day for dilated exam, even if acuity is normal. This is the highest-yield prevention opportunity.

Step 3 management: Document positioning compliance and warning-sign education in the chart at discharge — both are patient safety and medicolegal essentials.

Standard post-operative follow-up cadence:

Monitoring parameters:

Patient education and counseling:

Rehabilitation:

Systemic disease optimization:

Ethical, Legal, and Patient Safety Considerations

— Discuss anatomic success rate (~85–90% single procedure), final visual outcome dependency on macular status, risk of reoperation, risk of cataract, IOP elevation, endophthalmitis, sympathetic ophthalmia, anesthesia risks

— Special consent issues with intraocular gas: air travel restriction, anesthesia precautions

— Pediatric consent: parental consent plus age-appropriate assent

— Elderly patients with mild cognitive impairment may still have capacity for this specific decision — assess decision-specific capacity, not global cognition

— Patient who refuses surgery despite understanding risk of permanent vision loss: respect autonomy; document discussion thoroughly; involve ethics if family disputes

— ED to ophthalmology transfer: communicate time of onset, current acuity, macular status, positioning, NPO status, medications, anticoagulation, and contact phone number in writing

— After-hours coverage gaps are a major medicolegal source of delayed-RD malpractice claims

— Document call attempts, time of call, ophthalmologist name, recommendations, and time of arrival

— Pediatric RD with retinal hemorrhages and inconsistent history → mandatory CPS report for suspected abusive head trauma

— Elder abuse if neglect contributed to delayed presentation

— Workplace injury: OSHA reporting may apply

— State-specific reporting requirements for vision impairment (e.g., California requires physician reporting of visual conditions affecting driving)

— Counsel patients formally about driving restrictions; document the conversation

— Uninsured/underinsured patients face delays in ophthalmology access — advocate aggressively, use safety-net referrals, do not assume "next available clinic" is acceptable for time-sensitive disease

— Language-concordant consent and follow-up instructions reduce post-op complications

— Misdiagnosing curtain vision loss as migraine or stroke

— Failure to perform or document dilated fundus exam after flashes/floaters

— Failure to refer urgently in macula-on detachment

— Failure to communicate gas-bubble air-travel restriction

Board pearl: A patient with flashes/floaters discharged without dilated exam who returns with macula-off RD is a textbook malpractice scenario. The ED standard is to either dilate and examine, or arrange definitive ophthalmology evaluation within an appropriate window (often 24–72 hours).

Informed consent for surgery:

Capacity considerations:

Transitions of care — high-risk handoff:

Mandatory reporting:

Driving and occupational safety:

Health equity issues:

Malpractice patterns:

High-Yield Associations and Rapid-Fire Clinical Facts

— Rhegmatogenous = tear-driven (most common) — surgical

— Tractional = pulling membranes (diabetic) — vitrectomy

— Exudative = fluid leak from choroid — treat cause, no surgery

Board pearl: The triad "flashes + floaters + curtain" in a stem is retinal detachment until proven otherwise. The next best step is virtually always urgent ophthalmology consultation/referral, not CT, not MRI, not "follow up in clinic."

Risk factors (memorize): High myopia (>6 D), pseudophakia, prior RD in fellow eye, trauma, lattice degeneration, family history, Stickler, Marfan, Ehlers-Danlos, diabetes (tractional), sickle cell, prematurity (ROP)

Symptoms: Flashes + floaters + curtain (peripheral progressing central). Painless.

Signs: Visual field defect opposite the detachment location, RAPD if large/macula-off, lower IOP in affected eye, Shafer sign (pigment in vitreous)

Three types of RD:

Macula-on RD = repair within 24 hours. Macula-off RD = repair within 1 week.

POCUS findings: Thick hyperechoic membrane tethered to optic disc and ora serrata, limited mobility

Pneumatic retinopexy gas: SF6 (~2 weeks), C3F8 (~6–8 weeks). No air travel, no nitrous oxide while gas present.

Scleral buckle: Best for young phakic, inferior, multiple breaks. Induces myopia.

Vitrectomy: Pseudophakic, posterior breaks, hemorrhage, giant tears, tractional. Cataract follows.

PVR = most common cause of surgical failure

Stickler syndrome = most common inheritable pediatric RD; COL2A1; midface, hearing, joints

Weiss ring = annular floater = PVD around optic disc

Shafer sign = pigmented vitreous cells = highly predictive of retinal break

Cherry-red spot = CRAO (not RD); "blood and thunder" = CRVO

Migraine aura is bilateral and resolves; RD is monocular and persistent

Bilateral serous RD in pregnant patient = severe preeclampsia → magnesium, antihypertensives, delivery

Fellow-eye RD lifetime risk: ~10%

GCA suspect in any patient >50 with new monocular vision loss: ESR, CRP, temporal artery biopsy, immediate steroids

Endophthalmitis = pain + hypopyon + vision loss post-op → emergency intravitreal antibiotics

Board Question Stem Patterns

"A 62-year-old man with high myopia reports 2 days of flashing lights and 'a black curtain coming up from the bottom of my right eye.' Visual acuity is 20/30 OD, 20/20 OS. Confrontation fields show a superior defect OD. There is a relative afferent pupillary defect OD."

→ Answer: Urgent ophthalmology consultation (macula-on by acuity — repair within 24 hours)

"A 58-year-old woman reports 1 day of new floaters and brief light flashes in the left eye. Acuity is 20/20 OU, full fields, no RAPD. Bedside ocular ultrasound is normal."

→ Answer: Same-day or next-day dilated fundus exam by ophthalmology to evaluate for retinal tear (10–15% of acute PVD have a tear)

"A 70-year-old pseudophakic patient reports 5 days of progressive visual loss in the right eye, now 'only sees hand motion.' Field defect involves all but the temporal periphery."

→ Answer: Ophthalmology referral within 24–72 hours for scheduled vitrectomy or scleral buckle

"A 32-year-old G2P1 at 35 weeks reports headache and 'spots' in both eyes. BP 175/108, 3+ proteinuria. Fundus exam reveals bilateral serous retinal detachments."

→ Answer: Magnesium sulfate, antihypertensives, plan delivery — RD resolves with delivery; no surgery

"A 48-year-old with poorly controlled T2DM and prior proliferative retinopathy notes progressive vision loss over 2 weeks. Fundus shows fibrovascular membranes tenting the retina."

→ Answer: Pars plana vitrectomy with membrane peeling ± anti-VEGF pretreatment

"A 75-year-old reports sudden complete vision loss in the right eye on awakening. Acuity is light perception only. Fundus shows a pale retina with a cherry-red spot."

→ Answer: CRAO — stroke workup, not RD repair

"A 78-year-old with new headache, jaw fatigue, and sudden right eye vision loss. ESR 95."

→ Answer: High-dose IV/oral steroids immediately, temporal artery biopsy — not RD

"Post-vitrectomy patient with C3F8 gas asks about flying home in 3 days."

→ Answer: No air travel until gas resolves (~6–8 weeks) — risk of acute angle-closure glaucoma

Step 3 management: Recognize that the next best step is rarely an imaging study — it is consultation, positioning, and timing decisions.

Pattern 1 — Classic rhegmatogenous RD:

Pattern 2 — PVD vs RD distinction:

Pattern 3 — Macula-off RD:

Pattern 4 — Exudative RD in preeclampsia:

Pattern 5 — Tractional RD in diabetic:

Pattern 6 — Differential trap (CRAO):

Pattern 7 — GCA mimic:

Pattern 8 — Air travel pitfall:

One-Line Recap

Retinal detachment is a vision-threatening emergency characterized by monocular flashes, floaters, and a progressive curtain-like visual field defect that demands same-day ophthalmology referral, with macula-on detachments requiring surgical repair within 24 hours to preserve central vision.

Board pearl: When in doubt on Step 3, the answer is urgent ophthalmology consultation — never "reassure and follow up in clinic" for new monocular curtain vision loss, and never CT head as the first step. The clock is the macula.

Recognize the triad: Flashes + floaters + curtain (painless, monocular, progressive) = RD until proven otherwise. Confirm with bedside POCUS showing a thick hyperechoic membrane tethered to the optic disc; rule out PVD, vitreous hemorrhage, CRAO, GCA, and stroke as mimics.

Triage by macular status: Macula-on (preserved central acuity) = emergent surgery within 24 hours; macula-off (acuity ≤ counting fingers) = urgent repair within 3–7 days. Position the patient so gravity keeps subretinal fluid away from the macula while awaiting OR.

Match treatment to mechanism: Rhegmatogenous → pneumatic retinopexy, scleral buckle, or vitrectomy; tractional (diabetic) → vitrectomy with membrane peel ± anti-VEGF; exudative → treat the underlying cause (preeclampsia, VKH, hypertensive emergency, choroidal tumor), no surgical repair.

Counsel and follow: Educate about fellow-eye risk (~10% lifetime), warning symptoms requiring same-day return, gas bubble precautions (no air travel, no nitrous oxide), positioning compliance, and long-term annual dilated exams. Document informed consent, transition-of-care communication, and mandatory reports (suspected abusive head trauma in pediatric cases).