Retinal Detachment

Topic Overview

Summary

Retinal detachment (RD) is the separation of the neurosensory retina from the underlying retinal pigment epithelium (RPE), representing an ophthalmic emergency that can lead to irreversible vision loss. The condition affects approximately 10-15 per 100,000 individuals annually, with three distinct pathophysiological mechanisms: rhegmatogenous (90% of cases—caused by retinal break), tractional (vitreoretinal traction without break), and exudative (fluid accumulation without break). [1,2]

Classic presentation follows a characteristic sequence: sudden onset floaters, photopsia (flashes of light), progressive "curtain" or shadow obscuring vision, culminating in visual field loss or complete vision loss if the macula detaches. Early recognition is critical—macula-on detachments require same-day surgical intervention to preserve central vision, while macula-off detachments should undergo surgery within 24-72 hours. [3,4]

Surgical management includes pneumatic retinopexy (gas bubble tamponade), scleral buckle (external indentation), and pars plana vitrectomy (PPV)—the most commonly employed technique. Anatomical reattachment is achieved in over 90% of cases with single surgery, though visual outcomes depend critically on macula status at presentation and time to surgical intervention. [5,6]

Key Facts

Clinical Pearls

Floaters + flashes = retinal tear until proven otherwise. Requires urgent same-day dilated fundoscopy by ophthalmology—15% of acute posterior vitreous detachment (PVD) has retinal tear, 50% of untreated tears progress to RD. [7]

"Curtain" or "shadow" = detachment has already occurred. Floaters and flashes represent the pre-detachment warning phase (tear formation); curtain indicates established RD.

Macula-on RD = same-day surgery; macula-off = within 24-72 hours. Every hour of macula-off time reduces final visual acuity. Time is retina. [8]

Shafer's sign (tobacco dust): Pigmented cells in anterior vitreous on slit lamp examination—pathognomonic for retinal break, even if RD not yet visible.

No flying with intraocular gas: Gas expands at altitude (50% volume increase at commercial cruising altitude)—can cause catastrophic IOP rise, central retinal artery occlusion, and irreversible blindness. Contraindication lasts 6-8 weeks for SF6, 10-12 weeks for C3F8. [9]

Why This Matters Clinically

Retinal detachment is a painless, time-critical emergency that can be mistaken for benign floaters, migraine aura, or posterior vitreous detachment. Delay in diagnosis by as little as 24-48 hours in macula-on cases results in progression to macula-off status, reducing visual prognosis from 20/30-20/40 to 20/60-20/100 or worse. [10]

Emergency physicians, general practitioners, and optometrists must recognize the cardinal symptoms and initiate same-day ophthalmology referral. Any patient presenting with new-onset floaters and flashes requires urgent dilated fundoscopy—clinical examination alone cannot rule out retinal tear or early detachment.

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Visual Summary

Visual assets to be added:

• Retinal anatomy cross-section (neurosensory retina, RPE, choroid)
• Fundus photo showing rhegmatogenous RD with visible tear
• Three types of RD comparison (rhegmatogenous, tractional, exudative)
• Surgical repair options diagram (PPV, scleral buckle, pneumatic retinopexy)
• Macula-on vs macula-off OCT comparison
• Proliferative vitreoretinopathy grading
• Post-operative positioning for gas tamponade

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Epidemiology

Incidence and Prevalence

Global incidence: 10-15 cases per 100,000 population per year, with geographic variation (higher in Caucasian populations, lower in African and Asian populations). [1,11]

Lifetime risk: Approximately 1 in 300 (0.3%) in the general population; increases to 1-2% in high myopes (>-6.00 diopters) and 2-3% in eyes post-cataract surgery. [12]

Bilateral risk: 10-15% lifetime risk of RD in fellow eye after unilateral RD, rising to 25-30% if bilateral high myopia or family history present. [13]

Demographics

Risk Factors

Age-related factors: Posterior vitreous detachment (PVD) occurs in > 60% of individuals over 60 years, representing the primary precipitant of rhegmatogenous RD in the elderly. [14]

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Pathophysiology

Retinal Anatomy and Adhesion

The retina consists of:

1. Neurosensory retina: 10 layers including photoreceptors (rods/cones), bipolar cells, ganglion cells
2. Retinal pigment epithelium (RPE): Single layer of pigmented cells adherent to Bruch's membrane
3. Potential subretinal space: Between photoreceptor outer segments and RPE—site of detachment

Normal retinal adhesion maintained by:

• Metabolic pump function of RPE (active fluid removal)
• Mechanical adhesion at optic disc and ora serrata
• Weak adhesion elsewhere (allows separation in pathological states)

Photoreceptors depend on RPE for metabolic support and outer segment phagocytosis. Separation > 24-48 hours leads to photoreceptor apoptosis and irreversible vision loss. [15]

Types of Retinal Detachment

1. Rhegmatogenous (90% of cases)

Pathogenesis:

1. Posterior vitreous detachment (PVD): Age-related vitreous liquefaction (syneresis) causes vitreous collapse and separation from retina
2. Retinal tear formation: At points of abnormal vitreoretinal adhesion, traction during PVD creates full-thickness retinal break
3. Fluid ingress: Liquefied vitreous enters subretinal space through break
4. Progressive detachment: Fluid accumulation driven by gravity, eye movements, and intraocular fluid currents

Common tear locations:

• Superotemporal quadrant (most common—45%)
• Inferotemporal quadrant (25%)
• Associated with lattice degeneration, retinal holes, or dialyses (ora serrata)

Types of breaks:

• Horseshoe tears: Flap-shaped tear with anterior edge (from traction)
• Round atrophic holes: From chronic retinal thinning
• Dialysis: Tear at ora serrata (often traumatic)

2. Tractional (5-10% of cases)

Pathogenesis: Vitreoretinal membranes mechanically pull retina from RPE without retinal break.

Causes:

• Proliferative diabetic retinopathy (most common): Fibrovascular membranes
• Retinopathy of prematurity (ROP): Peripheral fibrous proliferation
• Proliferative vitreoretinopathy (PVR): Post-surgical or post-RD
• Penetrating trauma: Fibrous scarring

Key distinction: Detachment is concave, confined to area of membrane traction, often stationary (unlike progressive rhegmatogenous RD).

3. Exudative/Serous (less than 5% of cases)

Pathogenesis: Subretinal fluid accumulation without retinal break, due to breakdown of blood-retinal barrier or active fluid production.

Causes:

• Choroidal tumors: Melanoma, metastases, hemangioma
• Inflammatory conditions: Posterior scleritis, Vogt-Koyanagi-Harada disease, sympathetic ophthalmia
• Vascular disorders: Severe hypertension, eclampsia, Coats disease
• Central serous chorioretinopathy: Focal RPE dysfunction

Key distinction: Shifting fluid with position changes, no tobacco dust, subretinal fluid on OCT without retinal break.

Posterior Vitreous Detachment (PVD)

Vitreous structure:

• Gel-like structure (99% water, 1% collagen and hyaluronic acid)
• Adherent to retina at: vitreous base (ora serrata), optic disc, macula, retinal vessels, areas of lattice degeneration

Age-related changes (syneresis):

• Collagen fibrils collapse, pockets of liquefaction form
• Eventually posterior vitreous cortex separates from internal limiting membrane of retina
• Occurs in > 60% by age 60, > 75% by age 75

Acute PVD symptoms:

• Floaters: Sudden increase (vitreous opacities, blood, pigment)
• Photopsia: Flashes of light in peripheral vision (mechanical stimulation of retina)
• Weiss ring: Circular floater (detached vitreous from optic disc)

Risk of retinal tear:

• 10-15% of acute symptomatic PVD have retinal tear at presentation [7]
• 50% of untreated retinal tears progress to RD within 6 weeks
• High-risk features: vitreous hemorrhage (85% have tear), pigmented vitreous cells (Shafer sign)

Macula Status: Critical Determinant

Macula-on RD:

• Detachment peripheral to macula; fovea remains attached
• Central vision preserved (typically 20/20 to 20/40)
• Urgency: Same-day surgery to prevent macula involvement
• Prognosis: Excellent—90% retain good central vision if repaired before macula detaches [8]

Macula-off RD:

• Foveal detachment with central vision loss (typically 20/60 to counting fingers)
• Photoreceptor damage begins within hours, accelerates after 24-48 hours
• Urgency: Surgery within 24-72 hours (every hour counts)
• Prognosis: Variable—visual recovery depends on duration of macula-off status [10]

Duration-dependent outcomes:

• Macula-off less than 24 hours: 50% achieve 20/40 or better
• Macula-off 1-7 days: 30% achieve 20/40 or better
• Macula-off > 7 days: less than 20% achieve 20/40 or better

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Clinical Presentation

Classic Symptom Sequence

Rhegmatogenous RD follows a stereotyped progression:

Stage 1: Vitreous separation (PVD)

• Sudden onset floaters (hours to days before tear)
• Photopsia (flashes)—typically in temporal peripheral vision
• No vision loss

Stage 2: Retinal tear formation

• Increased floaters (vitreous hemorrhage, pigment cells)
• Persistent or worsening flashes
• May notice subtle peripheral visual field defect

Stage 3: Established detachment

• Progressive "curtain," "shadow," or "veil" obscuring vision
• Curtain direction opposite to detachment location (superior RD → inferior curtain)
• Central vision preserved if macula-on; lost if macula-off

Stage 4: Macula involvement (if untreated)

• Sudden central vision loss
• Metamorphopsia (distortion)
• Loss of reading vision

Symptoms by Type

Red Flag Symptoms

Clinical Examination Findings

Visual Acuity

• Macula-on: Normal or near-normal (20/20 to 20/50)
• Macula-off: Reduced (20/60 to counting fingers or worse)
• Total RD: Hand movements or light perception

Visual Field

• Relative or absolute scotoma corresponding to RD location
• Superior RD → inferior field defect (most common)
• Progressively enlarges as detachment extends

Pupil Examination

• RAPD (relative afferent pupillary defect): Present if extensive RD (> 2 quadrants), macula-off, or longstanding
• Absent in small peripheral RD

Intraocular Pressure

• Often slightly reduced in affected eye (3-5 mmHg lower than fellow eye)—due to reduced aqueous production or increased uveoscleral outflow
• Beware: elevated IOP suggests alternative diagnosis (acute angle closure, neovascular glaucoma)

Slit Lamp Examination (Anterior Segment)

• Usually normal (RD is posterior segment pathology)
• Pigmented cells in anterior vitreous (Shafer sign/tobacco dust): Highly specific for retinal break—RPE cells liberated through tear [16]
• Vitreous hemorrhage visible as red blood cells in vitreous
• Weiss ring may be visible (glial ring from optic disc in PVD)

Dilated Fundoscopy (DIAGNOSTIC)

Direct/indirect ophthalmoscopy findings:

Retinal detachment:

• Pale, elevated, corrugated (undulating) appearance
• Loss of normal red reflex
• Retinal vessels appear darker, more prominent on detached retina
• Convex configuration (vs. concave in tractional RD)

Retinal tear:

• Red appearance (choroid visible through break)
• Often horseshoe-shaped with anterior flap
• May have surrounding hemorrhage (from torn retinal vessel)
• May be difficult to see if detachment extensive

Vitreous findings:

• Hemorrhage (if retinal vessel torn)
• Pigmented cells (Shafer sign)
• Posterior vitreous detachment (collapsed vitreous, Weiss ring)

Schisis vs. detachment:

• Retinal schisis (splitting of retinal layers): Smooth, dome-shaped, no pigmented cells, no flashes
• Retinal detachment: Corrugated, pigmented cells, mobile with eye movement

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Investigations

Clinical Diagnosis

Gold standard: Dilated indirect ophthalmoscopy by ophthalmologist—allows visualization of peripheral retina and identification of retinal breaks.

Scleral indentation: Technique to visualize far peripheral retina and ora serrata—essential to identify all retinal breaks before surgery.

Imaging Modalities

B-scan ultrasound characteristics:

• RD: Hyperechoic membrane, attached at disc and ora, aftermovement with eye movement ceases
• PVD alone: Hyperechoic membrane attached only at disc, mobile, no retinal elevation
• Vitreous hemorrhage: Low-level echoes in vitreous cavity
• Choroidal detachment: Thick, smooth dome, NOT attached at disc (vs. RD attached at disc)

Laboratory Investigations

Not routinely indicated for rhegmatogenous RD.

Consider in exudative RD:

• Blood pressure (hypertensive retinopathy)
• Urinalysis (eclampsia, renal disease)
• FBC, CRP, ESR (inflammatory/infectious causes)
• Syphilis serology, tuberculosis screening (infectious posterior uveitis)
• Chest X-ray (sarcoidosis, tuberculosis, metastatic disease)

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Classification & Staging

Classification by Mechanism

Combined mechanisms: Possible (e.g., tractional-rhegmatogenous in diabetic retinopathy—membrane traction creates tear).

Classification by Extent

Quadrant involvement:

• Localized: less than 1 quadrant
• Moderate: 1-2 quadrants
• Extensive: 3-4 quadrants

Clock-hour notation: Detachment extent described by clock hours (e.g., "RD from 10 to 2 o'clock").

Macula Status (Critical for Urgency)

Proliferative Vitreoretinopathy (PVR) Classification

PVR represents the most common cause of failed RD surgery—occurs in 10-15% of cases. [17]

Grading (updated Retina Society classification):

Grade A (minimal):

• Vitreous haze, pigment clumps

Grade B (moderate):

• Wrinkling of inner retinal surface
• Retinal stiffness, decreased mobility
• Rolled/irregular edge of retinal break

Grade C (marked):

• C1-3 (by number of clock hours involved):
  • Focal full-thickness retinal folds
  • Subretinal strands

Grade D (advanced):

• D1-3:
  • Wide-spread full-thickness retinal folds
  • Fixed retinal folds

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Differential Diagnosis

Conditions Mimicking Retinal Detachment

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Management

Immediate Management (Emergency Department/Primary Care)

On suspicion of RD:

1. Urgent ophthalmology referral—same-day assessment mandatory
2. Avoid eye manipulation: No tonometry, minimal examination
3. Position patient: Controversial, but if inferior RD suspected, keep head upright/semi-recumbent to slow superior progression (gravity-dependent)
4. No mydriatics unless instructed by ophthalmology (they will dilate for examination)
5. Nil by mouth if same-day surgery likely
6. Advise minimal activity: Avoid straining, heavy lifting, vigorous head movements

Do NOT:

• Delay referral for imaging
• Discharge with "follow-up" for new-onset floaters + flashes
• Attribute symptoms to "floaters" or "migraine" without ophthalmology assessment

Ophthalmology Assessment

Same-day dilated fundoscopy with indirect ophthalmoscopy and scleral indentation to:

1. Confirm RD vs. other pathology
2. Identify ALL retinal breaks (critical—missed breaks = surgical failure)
3. Assess macula status
4. Grade extent and PVR
5. Determine surgical approach

Retinal tear without detachment:

• Prophylactic laser photocoagulation or cryotherapy around tear to create adhesion
• Prevents progression to RD in 80-90% of cases
• Patient education on symptoms of progression

Established RD:

• Proceed to surgical repair

Surgical Management

Surgery is the ONLY definitive treatment for rhegmatogenous RD. Goals:

1. Identify and close all retinal breaks
2. Relieve vitreoretinal traction
3. Achieve retinal reattachment
4. Prevent proliferative vitreoretinopathy

1. Pneumatic Retinopexy

Technique:

• Office-based procedure
• Cryotherapy or laser applied to retinal break to induce chorioretinal adhesion
• Intravitreal gas injection (SF6 or C3F8)—expands to create bubble that tamponades break
• Strict head positioning required (position break superiorly) for 3-5 days

Indications:

• Single break or group of breaks within 1 clock hour
• Break in superior 8 clock hours (2-10 o'clock)
• No PVR
• Clear media to allow laser/cryo

Advantages:

• Minimally invasive, office procedure
• Rapid recovery
• No scleral buckle complications (diplopia, refractive change)

Disadvantages:

• Lower single-surgery success (75-80% vs. 90% for vitrectomy) [18]
• Requires strict positioning compliance
• Risk of missed breaks

Contraindications:

• Inferior breaks, multiple breaks > 1 clock hour apart, PVR, media opacity

2. Scleral Buckle

Technique:

• External approach: Silicone band/sponge sutured to sclera
• Creates inward indentation of scleral wall to oppose retina to RPE
• Relieves vitreous traction on tear
• Cryotherapy or laser applied to break to induce adhesion
• Subretinal fluid drainage optional (may drain through break or via small sclerotomy)

Indications:

• Younger patients (phakic—avoids cataract from vitrectomy)
• Single quadrant RD with identifiable breaks
• No significant vitreous hemorrhage or PVR

Advantages:

• Durable, long-lasting repair
• Avoids intraocular manipulation (lower cataract risk in phakic patients)
• No positioning requirements

Disadvantages:

• External surgery—diplopia (10%), refractive change (myopic shift)
• Longer operative time
• Buckle erosion/infection (rare—1-2%)

Success rate: 85-90% anatomical success with single surgery. [6]

3. Pars Plana Vitrectomy (PPV) — Most Common

Technique:

• Remove vitreous gel via 3-port or 4-port system
• Relieve all vitreoretinal traction
• Identify and drain subretinal fluid (internal drainage)
• Laser or cryotherapy around all breaks
• Intraocular tamponade: Gas (SF6, C3F8) or silicone oil

Indications:

• Complex RD (multiple breaks, PVR, posterior breaks, giant tears)
• Vitreous hemorrhage obscuring view
• Pseudophakic patients
• Macula-off RD (allows internal search for all breaks)
• Failed buckle or retinopexy

Gas tamponade:

• SF6 (sulfur hexafluoride): Lasts 2-3 weeks; requires face-down positioning 5-7 days
• C3F8 (perfluoropropane): Lasts 6-8 weeks; longer positioning but greater tamponade effect

Silicone oil:

• Permanent tamponade (until removed in second surgery)
• Indications: Severe PVR, unable to position, inferior breaks, recurrent detachment
• Complications: Cataract (100% if phakic), glaucoma, emulsification, keratopathy

Advantages:

• Highest single-surgery success rate (90-95%) [5]
• Allows complete vitreous removal and inspection for all breaks
• Can treat PVR

Disadvantages:

• Cataract progression in phakic patients (50-80% within 2 years)
• Requires prone/face-down positioning (if gas used)
• Risk of raised IOP with gas

Success rate: 90-95% anatomical reattachment with single PPV. [5,19]

Post-Operative Management

Positioning:

• Gas tamponade: Strict face-down or specific head positioning for 50 minutes per hour, 5-7 days (SF6) to 7-14 days (C3F8)
• Ensures gas bubble tamponades retinal break

Activity restrictions:

• Avoid air travel or high altitude—gas expands with decreased atmospheric pressure (50% volume expansion at 8,000 feet can cause catastrophic IOP rise and central retinal artery occlusion) [9]
• SF6: Avoid flying for 6-8 weeks
• C3F8: Avoid flying for 10-12 weeks

Medications:

• Topical steroid + antibiotic (prednisolone 1%, moxifloxacin) for 4 weeks
• Cycloplegic (cyclopentolate) for comfort in first week

Follow-up:

• Day 1, week 1, month 1, month 3, month 6, then annually
• Monitor for redetachment, PVR, raised IOP, cataract

Complications—immediate:

• Raised IOP (gas expansion)—manage with topical/systemic IOP-lowering agents
• Hemorrhage (suprachoroidal, vitreous)
• Endophthalmitis (rare—less than 0.05%)

Complications—delayed:

• Proliferative vitreoretinopathy (PVR): 10-15% incidence; requires reoperation with membrane peeling, oil tamponade [17]
• Recurrent detachment: 5-10%; often due to new breaks or PVR
• Cataract: 50-80% in phakic eyes post-PPV (usually within 2 years)
• Macular pucker/ERM: 10-20%; may require membrane peel
• Diplopia: Scleral buckle (10%)—usually resolves; rarely requires buckle removal

Management by Type

Tractional RD

• Observation if not threatening macula (common in diabetic retinopathy)
• Vitrectomy with membrane peeling if macula involved or progressive
• Address underlying cause (panretinal photocoagulation for proliferative diabetic retinopathy)

Exudative RD

• Treat underlying cause: Tumor (enucleation, radiotherapy, chemotherapy), inflammation (steroids, immunosuppression)
• Usually resolves once cause addressed
• NO surgical repair (no break to close)

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Complications

Complications of Retinal Detachment (Untreated/Delayed)

Complications of Surgery

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Prognosis & Outcomes

Anatomical Success

Single-surgery reattachment rates:

• Pneumatic retinopexy: 75-80% [18]
• Scleral buckle: 85-90% [6]
• Pars plana vitrectomy: 90-95% [5,19]

Final reattachment (after multiple surgeries): > 95% in most series.

Failure factors:

• Proliferative vitreoretinopathy (most common cause)
• Missed retinal breaks
• Large/giant retinal tears (> 3 clock hours)
• Inferior breaks

Visual Outcomes

Macula-on RD:

• 90% maintain preoperative visual acuity (usually 20/20-20/40) if repaired within 24 hours [8]
• Best visual outcomes in RD series

Macula-off RD:

• Duration-dependent: [10]
  • less than 24 hours: 50% achieve ≥20/40
  • 1-7 days: 30% achieve ≥20/40

  • 7 days: less than 20% achieve ≥20/40

• Median final VA: 20/60-20/100 in most series

Poor prognostic factors for vision:

• Macula-off > 7 days
• Extensive RD (> 2 quadrants)
• PVR at presentation
• Chronic RD (> 3 months)
• Foveal thinning on OCT (chronic macula-off)

Recurrence and Fellow Eye Risk

Recurrence (same eye):

• 5-10% recurrence risk after successful initial surgery [20]
• Higher risk with PVR, giant tears, multiple surgeries

Fellow eye risk:

• 10-15% lifetime risk of RD in fellow eye [13]
• Higher if bilateral high myopia, family history, lattice degeneration
• Prophylactic treatment of high-risk lesions (lattice, atrophic holes) controversial

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Prevention

Primary Prevention

High-risk screening:

• Annual dilated fundoscopy in high myopes (≥-6.00D)
• Post-cataract surgery education on RD symptoms
• Genetic counseling in Stickler syndrome, familial exudative vitreoretinopathy

Protective eyewear:

• Sports-related trauma prevention (racquet sports, high-contact sports)

Secondary Prevention (Retinal Tear Without Detachment)

Prophylactic treatment of retinal breaks:

• Laser photocoagulation or cryotherapy around tear to create chorioretinal adhesion
• Prevents progression to RD in 80-90% of cases
• Indicated for symptomatic tears (acute PVD with tear)

Controversial: Asymptomatic high-risk lesions

• Lattice degeneration: Prophylactic treatment generally NOT recommended (low progression risk)
• Atrophic holes: Observation unless symptomatic or bilateral RD history

Tertiary Prevention (Post-RD Surgery)

Patient education:

• Recognize symptoms of recurrence (floaters, flashes, curtain)
• Adhere to positioning requirements
• Avoid air travel with gas tamponade

Follow-up:

• Lifelong annual dilated examination (both eyes)

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Special Populations

Pediatric RD

• Often traumatic or associated with inherited conditions (Stickler syndrome, familial exudative vitreoretinopathy)
• Higher rate of PVR
• Challenging positioning compliance

Pregnancy

• RD rare but can occur with eclampsia (exudative RD)
• Rhegmatogenous RD managed similarly; surgery safe in pregnancy if necessary
• Valsalva during labor does NOT increase RD risk (vaginal delivery not contraindicated)

High Myopes

• Lifetime risk 1-2% (vs. 0.3% general population)
• Often younger onset (20-40 years)
• Increased risk of atypical/peripheral breaks

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Examination Focus (MRCP/OSCE/Viva)

Clinical Examination Stations

OSCE scenario: "Examine this patient's eyes who presents with sudden vision loss."

Key steps:

1. Visual acuity (Snellen chart)—compare both eyes
2. Visual fields (confrontation)—identify scotoma
3. Pupil examination—check for RAPD
4. Slit lamp—look for pigmented vitreous cells (Shafer sign)
5. Dilated fundoscopy (if allowed)—describe RD findings

Model answer for fundoscopy: "I can see a pale, elevated area of retina in the [superior/inferior] quadrant with a corrugated appearance, consistent with retinal detachment. I would like to perform indirect ophthalmoscopy with scleral indentation to identify retinal breaks. This patient requires urgent ophthalmology referral for surgical repair."

Viva Scenarios

Q1: A 65-year-old presents with sudden floaters and flashes. What is your differential and management?

Model answer: "The key differential is posterior vitreous detachment vs. retinal tear vs. established retinal detachment. 10-15% of acute PVD have retinal tears at presentation, and 50% of untreated tears progress to detachment. I would arrange same-day dilated fundoscopy by ophthalmology. If a retinal tear is found without detachment, prophylactic laser or cryotherapy can prevent progression. If detachment is present, surgical repair is required urgently—same-day if macula-on, within 24-72 hours if macula-off."

Q2: What are the surgical options for rhegmatogenous retinal detachment?

Model answer: "There are three main surgical approaches: pneumatic retinopexy, scleral buckle, and pars plana vitrectomy. Pneumatic retinopexy is minimally invasive with a gas bubble and laser, suitable for superior single breaks, but has lower success (75-80%). Scleral buckle is an external procedure creating indentation to close the break, suitable for younger phakic patients with localized RD. Pars plana vitrectomy is the most common approach, especially for complex RD, with 90-95% success, but causes cataract in phakic patients. Choice depends on break location, PVD status, lens status, and surgeon preference."

Q3: Why can't patients fly with intraocular gas?

Model answer: "Intraocular gas expands with decreased atmospheric pressure. At commercial cruising altitude, gas volume increases by approximately 50%. This causes catastrophic intraocular pressure rise, potentially leading to central retinal artery occlusion and irreversible blindness. Patients must avoid flying for 6-8 weeks with SF6 gas and 10-12 weeks with C3F8 gas. They must wear a medical alert bracelet warning anesthetists, as nitrous oxide similarly expands gas and is contraindicated."

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Patient & Family Information

What is Retinal Detachment?

Retinal detachment is when the light-sensitive layer at the back of your eye (the retina) pulls away from its normal position. Think of it like wallpaper peeling off a wall. The retina needs to stay attached to receive oxygen and nutrients. Without urgent treatment, retinal detachment causes permanent blindness.

Warning Signs—Seek Help IMMEDIATELY if You Notice:

1. Sudden increase in floaters (dark specks or cobwebs floating in your vision)
2. Flashes of light (especially in the corner of your vision)
3. A "curtain" or "shadow" moving across your vision
4. Sudden vision loss in one eye

What Should I Do?

See an eye doctor TODAY. Retinal detachment is an emergency. If you cannot reach an eye specialist immediately, go to the nearest Emergency Department.

Time matters: The sooner you are treated, the better your chances of saving your vision. If the central part of your retina (macula) is still attached, emergency surgery within 24 hours can preserve your central vision in 90% of cases.

How is it Treated?

Treatment is always surgery. There are three main types:

1. Pneumatic retinopexy: A gas bubble is injected to push the retina back. You must keep your head in a specific position for several days.
2. Scleral buckle: A silicone band is placed around your eye to support the retina.
3. Vitrectomy: The jelly inside your eye is removed and replaced with gas or oil to hold the retina in place.

After Surgery

• Positioning: You may need to keep your head face-down or in a specific position for 5-14 days (if gas is used).
• Flying: You CANNOT fly or travel to high altitude while gas is in your eye (6-12 weeks depending on gas type). The gas expands at altitude and can cause blindness.
• Vision recovery: Vision improves gradually over weeks to months. If your macula was detached, full vision recovery may not be possible.

Will it Happen Again?

• There is a 5-10% chance of detachment recurring in the same eye.
• There is a 10-15% chance of detachment in your other eye.
• You need lifelong annual eye examinations for both eyes.

Can I Prevent It?

If you have risk factors (severe short-sightedness, family history, previous detachment), have annual dilated eye examinations. If you notice new floaters or flashes, see an eye doctor immediately—early treatment of retinal tears can prevent detachment.

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Evidence & Guidelines

Key Guidelines

1. Royal College of Ophthalmologists (RCOphth). Commissioning Guide: Retinal Detachment Surgery. 2019.

   • Macula-on RD should be repaired within 24 hours.
   • Macula-off RD should be repaired within 7 days (ideally 24-72 hours).

2. American Academy of Ophthalmology (AAO). Preferred Practice Pattern: Posterior Vitreous Detachment, Retinal Breaks, and Lattice Degeneration. 2019.

   • Symptomatic PVD requires same-day dilated examination.
   • Retinal tears require prophylactic treatment.

3. European Society of Retina Specialists (EURETINA). Guidelines for the Management of Rhegmatogenous Retinal Detachment. 2020.

Landmark Studies and Key Evidence

Epidemiology and Natural History:

[1] Mitry D, et al. The epidemiology of rhegmatogenous retinal detachment: geographical variation and clinical associations. Br J Ophthalmol. 2010;94(6):678-684. PMID: 19515646. DOI: 10.1136/bjo.2009.157727

[2] Feltgen N, Walter P. Rhegmatogenous retinal detachment—an ophthalmologic emergency. Dtsch Arztebl Int. 2014;111(1-2):12-22. PMID: 24565273. DOI: 10.3238/arztebl.2014.0012

Macula Status and Urgency:

[3] Hassan TS, et al. The effect of duration of macular detachment on results after the scleral buckle repair of primary, macula-off retinal detachments. Ophthalmology. 2002;109(1):146-152. PMID: 11772595. DOI: 10.1016/s0161-6420(01)00886-7

[4] Salicone A, et al. Visual recovery after scleral buckling procedure for retinal detachment. Ophthalmology. 2006;113(10):1734-1742. PMID: 16872674. DOI: 10.1016/j.ophtha.2006.03.064

Surgical Techniques and Outcomes:

[5] Wickham L, et al. Outcomes of surgery for primary rhegmatogenous retinal detachment including assessment of macular status. Retina. 2011;31(7):1325-1330. PMID: 21487337. DOI: 10.1097/IAE.0b013e31820a6818

[6] Tornquist R, et al. The retinal detachment study: scleral buckling versus primary vitrectomy. Acta Ophthalmol Scand. 2001;79(1):1-6. PMID: 11167280. DOI: 10.1034/j.1600-0420.2001.079001001.x

Posterior Vitreous Detachment and Retinal Tears:

[7] Coffee RE, et al. Symptomatic posterior vitreous detachment and the incidence of delayed retinal breaks. Ophthalmology. 2007;114(7):1357-1362. PMID: 17337052. DOI: 10.1016/j.ophtha.2006.10.054

[8] Williamson TH, et al. Factors affecting the outcome of primary retinal detachment surgery. Retina. 2005;25(6):695-705. PMID: 16141855. DOI: 10.1097/00006982-200509000-00001

Gas Tamponade and Air Travel:

[9] Lincoff H, et al. Intravitreal longevity of three perfluorocarbon gases. Arch Ophthalmol. 1980;98(9):1610-1611. PMID: 7417057. DOI: 10.1001/archopht.1980.01020040462015

Duration of Macula-off and Visual Outcomes:

[10] Ross WH, et al. Visual recovery after macula-off retinal detachment. Eye. 2002;16(4):440-446. PMID: 12101451. DOI: 10.1038/sj.eye.6700150

Geographic and Demographic Variation:

[11] Li X. Incidence and epidemiological characteristics of rhegmatogenous retinal detachment in Beijing, China. Ophthalmology. 2003;110(12):2413-2417. PMID: 14644727. DOI: 10.1016/S0161-6420(03)00867-4

[12] The Eye Disease Case-Control Study Group. Risk factors for idiopathic rhegmatogenous retinal detachment. Am J Epidemiol. 1993;137(7):749-757. PMID: 8484365. DOI: 10.1093/oxfordjournals.aje.a116735

Bilateral Risk:

[13] Zou H, et al. Bilaterality and risk factors for fellow eye involvement in rhegmatogenous retinal detachment. Retina. 2002;22(3):279-282. PMID: 12055460. DOI: 10.1097/00006982-200206000-00004

PVD and Aging:

[14] Sebag J. Vitreous and vision degrading myodesopsia. Prog Retin Eye Res. 2020;79:100847. PMID: 32171919. DOI: 10.1016/j.preteyeres.2020.100847

Photoreceptor Damage and RPE:

[15] Arroyo JG, et al. Photoreceptor apoptosis in human retinal detachment. Am J Ophthalmol. 2005;139(4):605-610. PMID: 15808154. DOI: 10.1016/j.ajo.2004.11.046

Shafer Sign:

[16] Shafer DM. Pigmented cells in the vitreous as a sign of retinal break. Arch Ophthalmol. 1974;91(1):22-25. PMID: 4808560. DOI: 10.1001/archopht.1974.03900060024003

Proliferative Vitreoretinopathy:

[17] Machemer R, et al. An updated classification of retinal detachment with proliferative vitreoretinopathy. Am J Ophthalmol. 1991;112(2):159-165. PMID: 1867299. DOI: 10.1016/s0002-9394(14)76695-4

Pneumatic Retinopexy Outcomes:

[18] Hillier RJ, et al. The Pneumatic Retinopexy versus Vitrectomy for the Management of Primary Rhegmatogenous Retinal Detachment Outcomes Randomized Trial (PIVOT). Ophthalmology. 2019;126(4):531-539. PMID: 30447986. DOI: 10.1016/j.ophtha.2018.11.014

Vitrectomy Outcomes:

[19] Sharma YR, et al. Functional and anatomic outcomes of different vitreoretinal surgical techniques for repair of rhegmatogenous retinal detachment. Retina. 2005;25(5):561-568. PMID: 16077350. DOI: 10.1097/00006982-200507000-00004

Recurrence Risk:

[20] Schwartz SG, et al. Management of primary rhegmatogenous retinal detachment. Surv Ophthalmol. 2020;65(3):270-281. PMID: 31689415. DOI: 10.1016/j.survophthal.2019.10.004

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Related Topics

• Posterior Vitreous Detachment
• Vitreous Haemorrhage
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• Proliferative Vitreoretinopathy
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• Ocular Trauma
• Stickler Syndrome
• Lattice Degeneration

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Metadata

Author: MedVellum Content Team
Reviewers: Consultant Ophthalmologist (Vitreoretinal Surgery)
Target Examinations: MRCP Part 2, FRCOphth, Emergency Medicine FRCEM
Difficulty: Moderate-High
Estimated Reading Time: 25 minutes
Last Updated: 2025-01-07

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