Visual Acuity Testing
Testing distance6 metres (standard)
Normal vision6/6 (20/20)
Driving standard (UK/GCC)6/12 or better
Legal blindness threshold6/60 in better eye
Severe VI6/60 – 3/60
Profound VI<3/60 to perception of light
Pinhole Test
Improves VA due to refractive error → if VA improves with pinhole, likely refractive cause. No improvement suggests pathological cause (corneal/retinal/optic nerve).
PERL acronymPupils Equal Reactive to Light
Normal diameter2–6 mm in room light
Anisocoria >1mmInvestigate — may be pathological
Direct responseSame eye constricts to light
Consensual responseContralateral eye constricts
RAPD — Relative Afferent Pupillary Defect
Swinging flashlight test. Affected eye dilates (paradoxical) when light swings to it. Indicates optic nerve or extensive retinal pathology (e.g., CRAO, optic neuritis).
Visual Field & Eye Movement Assessment
- Sit 1 metre from patient, same eye level
- Cover one eye at a time — patient fixes on examiner's nose
- Wiggle fingers or count fingers in 4 quadrants
- Document any field defects — scotoma, hemianopia, quadrantanopia
- Bitemporal hemianopia: pituitary lesion (chiasmal compression)
- Homonymous hemianopia: stroke/occipital lesion
- Arcuate defect: glaucoma (nerve fibre layer loss)
- Central scotoma: macular disease / optic neuritis
- Right gaze — tests R lateral rectus / L medial rectus
- Right up — tests R superior rectus / L inferior oblique
- Right down — tests R inferior rectus / L superior oblique
- Left gaze — tests L lateral rectus / R medial rectus
- Left up — tests L superior rectus / R inferior oblique
- Left down — tests L inferior rectus / R superior oblique
Diplopia assessmentNote position of max. separation
CN VI palsyLateral gaze palsy — commonest
CN III palsy (complete)Down-and-out, ptosis, fixed dilated pupil
Intraocular Pressure & Special Tests
Normal IOP range10–21 mmHg
Glaucoma suspect>21 mmHg (ocular hypertension)
Acute angle closureOften 40–70+ mmHg — EMERGENCY
Goldmann applanationGold standard, requires slit-lamp & fluorescein
Non-contact tonometryAir-puff — quick screening, less accurate
Icare reboundNo anaesthetic — useful for community
Nursing Note
Central corneal thickness (CCT) affects IOP readings. Thin corneas underestimate IOP; thick corneas overestimate. Document CCT where available.
Fundoscopy (Direct Ophthalmoscopy)
Red reflex presentNormal — retina intact
Absent red reflexCataract / vitreous haemorrhage / RD
Normal cup:disc ratio≤0.4 — >0.6 suspect glaucoma
Disc haemorrhageGlaucoma progression marker
PapilloedemaBlurred disc margins — raised ICP → URGENT
Ishihara Colour Vision
- 38 plates — 24 plates for definitive testing
- Detects red-green colour deficiency (commonest)
- Acquired colour defects may indicate optic nerve / macular disease
- Relevant for driving & occupational clearance
Slit-Lamp & Globe Integrity Assessment
Anterior Segment
- Corneal clarity, abrasions, ulcers
- Anterior chamber depth and flare/cells
- Hyphaema (blood in AC)
- Hypopyon (pus in AC)
- Lens opacities (cataract grading)
Fluorescein Staining
- Corneal epithelial defects stain green
- Instil 1 drop, use cobalt-blue filter
- Seidel test — flowing fluorescein = open globe (wound leak)
- Dendrite pattern = herpes simplex keratitis
Post-Trauma Globe Integrity
- Peaked/irregular pupil → suspect open globe
- Uveal prolapse (brown tissue visible)
- Positive Seidel test = wound leak
- Reduced IOP in context of trauma = suspect open globe
- DO NOT apply pressure or tonometry on suspected open globe
Critical — Know Your Ophthalmic Emergencies
Delayed treatment in ophthalmic emergencies causes permanent, irreversible vision loss. All nurses must be able to triage and initiate first-line management immediately.
Acute Angle-Closure Glaucoma (AACG)
Classic Presentation
- Sudden unilateral severe eye pain
- Halos around lights
- Nausea and vomiting (mimics GI emergency)
- Red eye (ciliary injection)
- Fixed, mid-dilated, non-reactive pupil
- Corneal haze/oedema (steamy appearance)
- Markedly reduced visual acuity
- Hard globe on palpation
IOP typically40–70+ mmHg
Risk factorsFar-sighted (hyperopia), Asian/Middle Eastern heritage, shallow AC, age >60
Immediate Nursing Management
- Alert ophthalmologist IMMEDIATELY — do not delay
- Pilocarpine 4% eye drops — miosis pulls iris from angle
- Timolol 0.5% eye drops — reduces aqueous production
- IV Acetazolamide 500 mg (or oral if unable) — carbonic anhydrase inhibitor
- IV Mannitol 20% 1–2 g/kg over 30–60 min if IOP remains high — hyperosmotic agent
- Analgesia and antiemetics for pain/nausea
- Position patient supine (allows lens to fall back)
- Arrange urgent laser peripheral iridotomy (LPI) — definitive treatment
Bilateral Prophylactic LPI
Once acute attack treated, contralateral eye requires prophylactic LPI as risk of bilateral attack is high.
Central Retinal Artery Occlusion (CRAO)
Presentation
- Sudden, painless, profound monocular vision loss
- VA may be count fingers or hand movements only
- RAPD present in affected eye
- Fundus: pale retina with cherry-red spot at fovea
- Attenuated arterioles; "cattle-trucking" of blood column
Time-Critical Window
Retinal ischaemia becomes irreversible after 90–100 minutes. Treat as stroke — activate emergency pathway. Assess for carotid disease, AF, cardiac emboli.
Immediate Actions
- Emergency referral to ophthalmology + stroke team
- Ocular massage (intermittent pressure with closed lid 5s on/5s off × 15 min) — dislodge embolus
- IOP lowering: topical beta-blocker + IV acetazolamide
- Rebreathe into paper bag — CO2 causes vasodilation (caution: hypoxia risk)
- Consider anterior chamber paracentesis (ophthalmologist)
- Refer for intra-arterial thrombolysis if <4.5h at specialised centres
- Initiate stroke workup: ECG, carotid Doppler, echocardiogram
- Antiplatelet therapy per stroke protocol
Chemical Eye Injury
PRIORITY #1 — IRRIGATE IMMEDIATELY
Do NOT take history, do NOT measure VA, do NOT wait for assessment. Begin irrigation with saline (preferred) or water immediately. Do not stop to triage.
Irrigation Protocol
- Instil topical anaesthetic (proxymetacaine/tetracaine) to enable cooperation
- Irrigate with 0.9% normal saline via IV giving set or eye wash — 2L minimum
- Hold eyelids open (lid speculum or fingers)
- Evert upper and lower lids — irrigate fornices thoroughly
- Continue for minimum 30 minutes (alkali injuries may need 60+ min)
- Check pH with litmus/pH paper at conjunctival fornix — target pH 7.0–7.4
- Wait 5 min and recheck pH — repeat irrigation if not normalised
- Only then proceed to full ophthalmic assessment
Alkali vs Acid Injuries
Alkali (worse)Lye/cement/bleach — penetrating liquefactive necrosis
AcidBattery acid/pool chemicals — coagulative necrosis, self-limiting
pH > 11Severe — penetrates AC
pH < 4Severe acid injury
Roper-Hall Grading (post-irrigation)
Grade IGood prognosis — corneal epithelial damage only
Grade IIGood prognosis — corneal haze, <1/3 limbal ischaemia
Grade IIIGuarded — 1/3–1/2 limbal ischaemia
Grade IVVery poor — >1/2 limbal ischaemia, opaque cornea
Open Globe Injury
NEVER Apply Pressure to a Suspected Open Globe
No eye pad, no IOP measurement, no eye drops (unless tetanus prophylaxis). Applying pressure expels intraocular contents and worsens outcome catastrophically.
Recognition Signs
- Peaked/teardrop-shaped pupil (pointing toward wound)
- Visible uveal prolapse (dark brown/black tissue)
- Positive Seidel test — streaming fluorescein
- Deep/flat anterior chamber
- Very low IOP (<6 mmHg) in context of trauma
- Obvious laceration or penetrating object
- Subconjunctival haemorrhage with underlying scleral involvement
Nursing Management
- Apply rigid eye shield (Fox shield or improvised cup) — NO padding
- Keep patient NPO — urgent surgical repair
- IV access — IV antibiotics (cefazolin/ciprofloxacin per protocol)
- Tetanus prophylaxis per immunisation history
- Antiemetics — vomiting increases IOP and risk of extrusion
- Analgesia — avoid Valsalva-inducing pain
- Urgent ophthalmology referral for primary repair
- CT orbit (no MRI if metallic foreign body suspected)
- Document mechanism, time, pre-injury vision
Glaucoma Classification
POAGPrimary open-angle — insidious peripheral field loss, no symptoms until late
PACGPrimary angle-closure — acute or chronic; Asian/Middle Eastern ethnicity higher risk
NTGNormal-tension — optic nerve damage despite IOP <21; vascular ischaemia mechanism
SecondaryDue to trauma, inflammation (uveitic), pseudoexfoliation, neovascular, steroid-induced
CongenitalBuphthalmos (enlarged eye), epiphora, photophobia in infants
The Silent Thief of Sight
POAG causes no pain, no redness. Patients lose peripheral vision first — central vision preserved until late. Half of patients in GCC are undiagnosed at presentation.
Target IOP30% reduction from baseline, or as set by ophthalmologist
Visual field testingHumphrey automated perimetry — 6–12 monthly
OCT optic nerveRetinal nerve fibre layer (RNFL) thickness — annual
Disc photographyBaseline + serial comparison for progression
Central corneal thicknessRisk stratification — thin CCT = higher true IOP
GonioscopyAnterior chamber angle assessment — open vs closed
Patient Education Priorities
- Life-long condition — treatment prevents progression, not cure
- Adherence is critical — missing drops causes irreversible vision loss
- Screen family members (1st degree relatives)
- Avoid prolonged head-down positions (yoga inversions)
IOP-Lowering Medications
| Drug Class |
Examples |
Mechanism |
Dosing |
Key Side Effects / Nursing Points |
| Prostaglandin Analogues |
Latanoprost, Bimatoprost, Travoprost |
Increase uveoscleral outflow |
Once daily — EVENING dose (less IOP fluctuation) |
Eyelash growth (hypertrichosis), iris colour darkening (irreversible), periorbital fat atrophy, conjunctival hyperaemia. Most effective class (~30% IOP reduction). |
| Beta-Blockers |
Timolol 0.5%, Betaxolol (selective) |
Reduce aqueous production |
Twice daily (timolol); once daily gel form available |
CONTRAINDICATED in asthma, COPD, heart block, bradycardia. Systemic absorption via nasolacrimal duct can cause bronchospasm. Betaxolol is beta-1 selective — safer in lung disease. |
| Carbonic Anhydrase Inhibitors |
Dorzolamide (topical), Brinzolamide, Acetazolamide (oral) |
Reduce aqueous production |
Twice–three times daily (topical) |
Metallic/bitter taste, stinging on instillation. Oral acetazolamide: paraesthesia, hypokalemia, renal stones, allergic reactions (sulfonamide allergy — avoid in sulfa allergy). |
| Alpha-2 Agonists |
Brimonidine 0.1–0.2%, Apraclonidine |
Reduce aqueous production + increase outflow |
Twice–three times daily |
Fatigue, dry mouth, allergic blepharoconjunctivitis (10–25% of patients over time). AVOID in children under 2 — CNS depression/apnoea. Drug interactions with MAOIs. |
| Miotics (Cholinergics) |
Pilocarpine 1–4% |
Increase trabecular outflow via ciliary muscle contraction |
Four times daily (acute: every 15 min) |
Miosis (dim vision), accommodative spasm (blurred), brow ache. Used acutely in angle-closure. Rarely used long-term now. |
Medication Administration Technique
Step-by-Step Technique
- Wash hands thoroughly
- Tilt head back or lie down, look upward
- Gently pull down lower lid to create a pouch
- Instil ONE drop into lower conjunctival fornix — not directly on cornea
- Close eye gently — do NOT squeeze
- Apply nasolacrimal occlusion (NLO) — press inner corner of eye with finger for 2 minutes
- If using multiple drops, wait 5 minutes between each
- Gels/ointments last — after all drops
Nasolacrimal Occlusion — Why It Matters
NLO reduces systemic absorption of topical eye drops through the nasolacrimal duct into the nasopharynx. Critical for timolol (prevents bronchospasm) and brimonidine (prevents CNS effects). Reduces systemic side effects by up to 60%.
One Drop Rule
The conjunctival sac holds only 7–10 microlitres. A standard eye drop is 25–50 microlitres. Instilling 2 drops wastes medication and increases systemic absorption. Always one drop per instillation.
Surgical Interventions
- Selective Laser Trabeculoplasty (SLT) — first-line option (NICE/EGS guidelines)
- Performed as outpatient — takes 5–10 minutes per eye
- Apraclonidine 1% pre/post laser to prevent IOP spike
- IOP check 1–2 hours post-procedure before discharge
- Warn: temporary blurred vision, mild aching post-procedure
- IOP reduction takes 4–6 weeks to manifest fully
- Can be repeated — SLT can be retreated (ALT cannot)
- Continue existing drops until ophthalmologist advises otherwise
- Filtering bleb is the surgical drainage bleb under upper lid
- Avoid rubbing eye — can rupture or flatten bleb
- Topical steroids (dexamethasone) and antibiotics post-op — essential for bleb modulation
- 5-Fluorouracil (5-FU) or Mitomycin C intraoperative — anti-scarring agents
- Bleb massage technique — gentle pressure below bleb to keep patent (only as directed)
- Hypotony management — if IOP very low (<5): reduce massage, add viscoelastic
- Signs of bleb failure: IOP rising, bleb flattening, vascularity
- Blebitis/endophthalmitis risk — red painful eye, purulent discharge → URGENT review
- Avoid swimming, contact sports 4–6 weeks
- Regular follow-up: day 1, week 1, month 1, month 3
20–25%
DM prevalence in GCC adults (world's highest)
>50%
T2DM patients develop DR after 10+ years
#1
Cause of preventable blindness in working-age adults in GCC
Diabetic Retinopathy Classification
| Stage | Features | Significance | Action |
|---|
| Mild NPDR |
Microaneurysms only |
Earliest change — capillary wall weakening |
Optimise glycaemia, BP, lipids. Annual review. |
| Moderate NPDR |
Microaneurysms + haemorrhages + hard exudates + cotton wool spots |
Increasing ischaemia |
Closer monitoring 6-monthly. Intensify systemic control. |
| Severe NPDR |
4-2-1 rule: haemorrhages 4 quadrants, 2+ venous beading, 1+ IRMA |
50% progress to PDR in 1 year |
Refer for laser consideration. 3–4 monthly review. |
| PDR — Proliferative DR |
NVD (neovascularisation at disc), NVE, vitreous/pre-retinal haemorrhage, tractional RD |
High risk of severe vision loss |
Urgent laser PRP or intravitreal anti-VEGF. Consider vitrectomy. |
| Diabetic Maculopathy |
Oedema/hard exudates within 1 disc diameter of fovea (clinically significant ME) |
Commonest cause of DR-related vision loss |
Intravitreal anti-VEGF injections. Monthly initially. |
Screening Intervals
Type 1 DMAnnual screening from 5 years after diagnosis (or from puberty, whichever earlier)
Type 2 DMAnnual screening from diagnosis (may have DR at diagnosis)
Pregnancy (pre-existing DM)Pre-conception + 12 weeks + 28 weeks — rapid DR progression in pregnancy
DR present (no treatment)3–6 monthly depending on severity
Post-treatment1–3 monthly until stable
Rapid Glycaemic Correction Risk
Rapid improvement in HbA1c (e.g., starting insulin) can paradoxically worsen DR short-term. Baseline eye exam before intensifying treatment is essential.
HbA1c target<53 mmol/mol (7%) — UKPDS landmark trial
BP target<130/80 mmHg — ACE inhibitors/ARBs first line (renoprotective)
LipidsTotal cholesterol <4 mmol/L; LDL <2 mmol/L — fenofibrate reduces DR progression
Smoking cessationAccelerates all microvascular complications
BMI / weightBariatric surgery can induce DM remission
Nurse Role in DR Prevention
- Ensure annual eye screening is booked and attended
- Reinforce glycaemic self-management education
- Identify and address barriers to screening (cultural, language, cost)
- Coordinate care between endocrinology and ophthalmology
Intravitreal Injection Nursing
Anti-VEGF Agents
Ranibizumab (Lucentis)Licensed — 0.5 mg / 0.05 mL
Bevacizumab (Avastin)Off-label — cost-effective alternative widely used in GCC
Aflibercept (Eylea)Licensed — 2 mg / 0.05 mL; longer-acting
Faricimab (Vabysmo)Newest — dual VEGF-A + Ang-2 inhibitor
Aseptic Preparation
- Povidone-iodine 5% conjunctival preparation — minimum 3 min contact time
- Sterile drape, speculum
- Topical or subconjunctival anaesthetic
- Injection site: 3.5 mm (phakic) or 3 mm (pseudophakic) from limbus
- 25–30 gauge needle — pars plana approach
Post-Injection Monitoring
- Check IOP at 30 minutes post-injection (transient rise expected)
- Check light perception / VA before discharge
- Educate on endophthalmitis warning signs
- Advise no swimming/contact lens for 72 hours
- Follow-up appointment booked before leaving
Endophthalmitis — Medical Emergency (within 48h)
- Severe eye pain or worsening pain post-injection
- Redness with hypopyon (pus level in anterior chamber)
- Sudden vision loss after injection
- Photophobia, purulent discharge
- ACTION: Emergency ophthalmic review within hours — intravitreal antibiotics (vancomycin + ceftazidime)
Laser Photocoagulation & Vitrectomy
- PRP for PDR — destroys ischaemic peripheral retina, reduces VEGF drive
- Typically 2–3 sessions of 1000–2000 burns
- Post-treatment: periorbital aching for 24–48h — paracetamol/NSAIDs
- Temporary increased photosensitivity — sunglasses advised
- Driving: do NOT drive on day of treatment (dilated pupils)
- Warn of peripheral vision reduction post-PRP (expected, unavoidable)
- Warn of possible worsening macular oedema short-term post-PRP
- Night vision may worsen (peripheral retinal destruction)
Face-Down Positioning
Gas bubble (C3F8 or SF6) must be maintained against the treated retina. Position is determined by the location of the break/pathology — ophthalmologist will specify exact posture.
- Face-down (prone) posturing: typically 45–50 min per hour, 10 min break
- Duration: 1–2 weeks depending on gas type and concentration
- Pressure-relieving cushions/massage chair for comfort
- Nursing: pressure area care, DVT prophylaxis, eye drop administration
- NO FLYING — gas expands at altitude → dangerous IOP rise
- Patient must carry "gas in eye" warning card
- Avoid nitrous oxide anaesthesia if gas bubble present
Cataract Surgery
Pre-operative
- Biometry (IOL power calculation) — ensure measurements taken
- Dilating drops: tropicamide 1% + phenylephrine 2.5% — start 60 min pre-op
- Consent: risks (posterior capsule rupture, endophthalmitis, TASS, RD, CME, dysphotopsia)
- Day-case procedure — local/topical anaesthetic
- Fasting: topical anaesthesia — no general fasting required in most cases
- Mark correct eye — WHO surgical safety checklist
- Anticoagulants: most continue aspirin; warfarin — ophthalmologist decision
- Alpha-blocker use (tamsulosin) → intraoperative floppy iris syndrome — flag to surgeon
Post-operative Regimen
Antibiotic dropsChloramphenicol / moxifloxacin — 4 weeks
Steroid dropsDexamethasone / prednisolone — taper over 4 weeks
Eye shield at night2 weeks — prevents accidental rubbing during sleep
No swimming4 weeks
Lifting restrictionsAvoid heavy lifting >5 kg for 2 weeks
DrivingOnly when VA confirmed adequate — typically 1–7 days in uncomplicated cases
New glassesWait 4–6 weeks post-op for refraction to stabilise
Acute Post-op Endophthalmitis (24–72h)
Pain, redness, vision loss, hypopyon → Emergency. IV + intravitreal antibiotics. Risk ~0.05% per eye.
Retinal Detachment Surgery
Surgical Options
Scleral buckleExternal explant compresses eye wall — good for phakic, peripheral breaks
Pars plana vitrectomyInternal surgery — most common; allows gas/oil tamponade
Pneumatic retinopexyOffice-based gas injection for select superior breaks
Gas tamponade typesSF6 (2 weeks), C3F8 (6–8 weeks), Air (1 week)
Silicon oilPermanent tamponade — requires second surgery for removal
Post-operative Positioning
Positioning is Break-Location Dependent
The gas bubble floats — patient must position so gas contacts the retinal break. Ophthalmologist prescribes exact position. Typical: face-down for inferior breaks; upright for superior breaks.
- Restrictions: 6 weeks total (no heavy lifting, contact sports)
- No flying with gas tamponade (altitude expansion risk)
- Silicon oil patients: can fly but require oil removal surgery later
- Pressure area management during prolonged face-down posturing
- Nutrition and hydration support during positioning
- Psychological support — positioning compliance affects outcome
Corneal Transplant Surgery
PK — Penetrating Keratoplasty
- Full-thickness corneal replacement
- Sutures remain 12–18 months
- Higher rejection risk — all layers replaced
- Long healing time — 12–18 months for visual rehabilitation
DMEK — Descemet Membrane
- Posterior lamellar — for Fuchs' endothelial dystrophy / bullous keratopathy
- Face-UP positioning for 1–2 hours post-op — air bubble pushes graft against host
- No sutures — faster visual recovery
- Lower rejection rate (<1% per year)
DALK — Deep Anterior Lamellar
- For keratoconus / anterior stromal disease
- Host endothelium preserved — zero endothelial rejection possible
- Technically demanding — big bubble technique
- Longer visual recovery than DMEK
Corneal Graft Rejection — Emergency Recognition
- RSVP mnemonic: Redness, Sensitivity to light, Vision decrease, Pain
- Rejection line (Khodadoust line) visible at slit-lamp
- ACTION: Immediate hourly topical steroids (prednisolone 1%) + urgent ophthalmology review
- Most rejections reversible if treated within 24–48 hours
- Long-term immunosuppression: topical steroids indefinitely in some patients
Regional Epidemiology
20–25%
Adult DM prevalence in GCC (global highest)
High
VKC prevalence — hot dry climate drives severe allergic eye disease
>1M
Hajj pilgrims annually — conjunctivitis outbreak risk
Diabetes-Related Eye Disease
GCC-Specific Factors
- Highest global DM prevalence — Saudi Arabia, UAE, Kuwait, Bahrain in top 10 worldwide
- High PDR burden — later presentation to health services historically
- Rapid urbanisation — sedentary lifestyle, dietary change drivers
- Cultural factors: asymptomatic disease may not prompt healthcare-seeking
- Male-dominant construction workforce — occupational risks compound DM complications
- Family-based diet — communal high-calorie meals
- Ramadan fasting — glycaemic management requires specialist adjustment
Nursing Response Strategies
- Culturally sensitive DM education — Arabic language resources
- Male family member engagement in care decisions
- Integration of DR screening in DM clinics
- Community outreach — shopping malls, mosques, workplaces
- Teleophthalmology: AI-assisted DR screening programmes expanding in GCC
- Ramadan-specific injection scheduling (intravitreal during non-fasting hours)
- Address fear of vision loss — motivational interviewing
GCC-Specific Conditions
GCC High Prevalence — Paediatric Emergency
Hot, dry climate + high pollen loads = severe VKC in GCC children and young adults. Can cause corneal shield ulcers and permanent vision loss if untreated.
DemographicsMale predominance; children 5–15 years; atopic background
FeaturesIntense itching, ropy mucus discharge, giant papillae (upper lid), Trantas dots at limbus, shield ulcer
SeasonalSpring/summer exacerbations in GCC — year-round in severe cases
TreatmentMast cell stabilisers (sodium cromoglicate), antihistamine drops, topical steroids (short-course), CsA drops
Nursing roleCold compresses, AC environment, cold water irrigation, UV sunglasses, cold eye drops from fridge
Consanguinity & Genetic Eye Disease
First-cousin marriages occur in 25–60% of GCC families in some regions. Autosomal recessive conditions are significantly more prevalent in GCC compared to global averages.
Leber Congenital Amaurosis (LCA)Severe visual impairment from birth — nystagmus, poor pursuit, photophobia; CEP290, RPE65 mutations common in GCC
Retinitis Pigmentosa (RP)Progressive rod-cone dystrophy — nyctalopia (night blindness), tunnel vision; autosomal recessive predominant in GCC
Cone DystrophiesCentral vision loss, colour defects, photophobia — CNGB3/CNGA3 mutations
Nursing roleGenetic counselling referral, low-vision rehabilitation, dark glasses, mobility training, family cascade screening
GCC Construction Workforce
Millions of migrant workers in GCC construction sector face high UV exposure, dust, chemical splash, and penetrating injury risk — ophthalmology awareness is critical.
- UV exposure — pterygium (wing-shaped conjunctival growth, endemic in GCC), photokeratitis ("welder's flash"), cataracts accelerated by UV
- Concrete/alkali splash — chemical injury; first response training essential
- Metallic foreign bodies — rust ring formation within 24h; urgent removal
- Protective eyewear: polycarbonate safety glasses (UV-blocking) mandatory
- Welding arc: auto-darkening helmets; photophthalmia prevention
- Sand/dust storms — epidemic keratoconjunctivitis (adenoviral) outbreaks
- Nurse role: occupational health screening, PPE compliance education, first aid training for chemical injury
High-Risk Behaviour — Cosmetic Lenses
GCC has extremely high rates of non-prescription cosmetic contact lens use — particularly coloured/circle lenses. Often purchased without eye exam, shared between users, and worn too long.
- Microbial keratitis (Acanthamoeba, Pseudomonas) — can cause corneal blindness
- Sleeping in lenses: 15× increased infection risk
- Tap water washing of lenses — Acanthamoeba keratitis risk
- Shared lenses — infection and parasitic transmission
- Nurse education: daily disposable promotion, no sleeping, no water contact, proper hand hygiene, annual eye exam before any lens purchase
- Regulatory awareness: many GCC countries now require prescription for all contact lenses
LASIK is one of the most commonly performed surgical procedures in GCC — high demand driven by military/police eligibility requirements and cosmetic preference.
Pre-operative Nursing Assessment
- Contact lens discontinuation: soft lenses 2 weeks, RGP 4–6 weeks pre-op (corneal shape normalisation)
- Dry eye assessment: Schirmer test, TBUT — significant dry eye is contraindication
- Pupil size in darkness — large pupils may cause night halos post-LASIK
- Corneal topography: keratoconus screening — absolute contraindication for LASIK
- Corneal thickness >500 microns required for safe ablation
Post-operative Nursing Care
- Steroid and antibiotic drops (1–2 weeks) + lubricants (3–6 months)
- No rubbing of eyes — flap dislodgement risk (LASIK) — 1 month minimum
- Protective goggles for sleep first week
- No swimming/contact sports 4 weeks
- Sun sensitivity — UV-blocking sunglasses advised 6 months
- Driving: when VA confirmed adequate — typically 24–48 hours
Hajj-Associated Eye Conditions
- Epidemic keratoconjunctivitis (adenovirus) — highly contagious, spreads rapidly in pilgrim crowds
- Bacterial conjunctivitis outbreaks — close contact, shared water sources
- Dry eye exacerbation — desert climate, low humidity, air travel
- UV photokeratitis — prolonged outdoor exposure during rituals
- Screening programmes at Hajj health facilities for DR/glaucoma
Kohl (Surma/Kajal) — Traditional Eye Cosmetics
Lead Toxicity Risk
Traditional kohl (antimony sulphide) may contain lead compounds (galena — lead sulphide). Regular use, especially in children, risks lead poisoning. Some commercial "kohl" products in GCC markets contain elevated lead. Nurse education: recommend commercial eyeliner products with regulatory approval; avoid in children and pregnant women.
- May cause conjunctival irritation, foreign body sensation
- Blocks meibomian glands → dry eye, blepharitis
- Trachoma historically associated with shared kohl applicators in rural communities
Background
- Chlamydia trachomatis serovars A-C cause trachoma (blinding trachoma)
- Historically common in rural/arid GCC regions — poor sanitation, water scarcity
- WHO SAFE strategy (Surgery, Antibiotics, Facial cleanliness, Environmental improvement) has dramatically reduced incidence
- Most GCC countries have achieved elimination targets or are near elimination
- Trichiasis (inturned lashes) from scarring → corneal abrasion → blindness
Current Nursing Relevance
- Migrant workers from trachoma-endemic countries (Sub-Saharan Africa, South Asia) — awareness needed
- Follicular conjunctivitis in children — differentiate from adenoviral/allergic
- Azithromycin 1g single dose (or tetracycline ointment) for active trachoma
- Surgical correction of trichiasis prevents blindness — trichiasis surgery awareness
- Hand hygiene and facial cleanliness — prevention education