NEET PG Rapid Revision
Ophthalmology One-Liners for NEET PG: Rapid Revision
High-yield ophthalmology one-liners for NEET PG covering glaucoma, cataract, retinal diseases, corneal pathology and neuro-ophthalmology.
MedNext Academy | 6 min read
Ophthalmology One-Liners for NEET PG: Rapid Revision
High-yield ophthalmology one-liners for NEET PG covering glaucoma, cataract, retinal diseases, corneal pathology and neuro-ophthalmology.
Ophthalmology: rapid revision one-liners for NEET PG
Ophthalmology in NEET PG focuses on glaucoma, cataract, retinal diseases, corneal pathology and neuro-ophthalmology. Questions are typically clinical-scenario based, testing your ability to identify the diagnosis and management.
These one-liners capture the classic examination findings, diagnostic criteria and treatment of choice for the most commonly tested ophthalmic conditions.
Must-know one-liners
- The most common cause of preventable blindness worldwide is cataract
- The most common cause of irreversible blindness worldwide is glaucoma
- Normal intraocular pressure (IOP) is 10-21 mmHg; measured by Goldmann applanation tonometry (gold standard)
- Primary open-angle glaucoma (POAG) is the most common type of glaucoma; painless, gradual visual field loss
- Acute angle-closure glaucoma presents with severe eye pain, halos around lights, mid-dilated fixed pupil and raised IOP
- Treatment of acute angle-closure glaucoma: IV mannitol, topical timolol, pilocarpine, then laser peripheral iridotomy
- Pilocarpine constricts the pupil (miosis) and opens the trabecular meshwork; used in angle-closure glaucoma
- Timolol is a beta-blocker that reduces aqueous humour production; used in glaucoma
- Latanoprost is a prostaglandin F2-alpha analogue that increases uveoscleral outflow; may cause iris darkening and eyelash growth
- Visual field defect in glaucoma: arcuate scotoma, nasal step, tunnel vision in advanced disease
- Fundoscopy in glaucoma shows increased cup-to-disc ratio (> 0.6 is suspicious), asymmetry between eyes and disc haemorrhages
- The most common type of cataract is age-related (senile) cataract; nuclear sclerosis is the most common subtype
- Sunflower cataract is associated with Wilson disease (chalcosis can also cause it)
- Oil drop cataract is seen in galactosaemia
- Christmas tree cataract (polychromatic lustre) is seen in myotonic dystrophy
- Phacomorphic glaucoma is secondary angle-closure due to an intumescent (swollen) cataract
- Phacolytic glaucoma is secondary open-angle glaucoma due to leakage of lens proteins through an intact but hypermature cataract
- Phacoemulsification is the standard technique for cataract surgery; uses ultrasonic fragmentation of the lens
- IOL (intraocular lens) power calculation uses the SRK formula; biometry measures axial length and keratometry
- Cherry-red spot on macula is seen in central retinal artery occlusion (CRAO), Tay-Sachs disease, Niemann-Pick disease and Gaucher disease
- Central retinal artery occlusion (CRAO) presents with sudden painless loss of vision; retina is pale with a cherry-red spot at the macula
- Central retinal vein occlusion (CRVO) presents with sudden painless loss of vision; fundus shows disc oedema, dilated tortuous veins and flame-shaped haemorrhages (stormy sunset appearance)
- Diabetic retinopathy: non-proliferative features include microaneurysms (earliest sign), hard exudates, dot-and-blot haemorrhages; proliferative features include neovascularisation
- Clinically significant macular oedema (CSME) is treated with focal laser photocoagulation or intravitreal anti-VEGF
- Pan-retinal photocoagulation (PRP) is the standard treatment for proliferative diabetic retinopathy
- Hypertensive retinopathy grading (Keith-Wagener-Barker): Grade 1 = arteriolar narrowing; Grade 4 = papilloedema
- Retinal detachment presents with floaters, flashes of light (photopsia) and a curtain-like visual field defect
- Rhegmatogenous retinal detachment (due to a retinal break) is the most common type
- Retinoblastoma presents as leukocoria (white pupillary reflex) in children; associated with Rb gene mutation on chromosome 13
- Corneal ulcer: bacterial ulcers are typically central; fungal ulcers have feathery/satellite lesions
- Dendritic ulcer (branching pattern with terminal bulbs) on fluorescein staining is characteristic of herpes simplex keratitis
- Band keratopathy (calcium deposition in Bowman membrane) is associated with hypercalcaemia, chronic uveitis and silicone oil in vitreous
- Kayser-Fleischer ring is a greenish-brown ring at the Descemet membrane periphery; seen in Wilson disease
- Bitemporal hemianopia is caused by a pituitary tumour compressing the optic chiasm
- Homonymous hemianopia is caused by a lesion in the optic tract or visual cortex on the opposite side
- RAPD (relative afferent pupillary defect/Marcus Gunn pupil) indicates optic nerve disease on the affected side; detected by the swinging flashlight test
- Argyll Robertson pupil: accommodates but does not react to light (light-near dissociation); seen in neurosyphilis
- Adie tonic pupil: dilated, sluggish reaction to light with vermiform movements of the iris; associated with absent knee/ankle jerks (Holmes-Adie syndrome)
- Papilloedema is optic disc swelling due to raised intracranial pressure; it is bilateral and does not cause early vision loss (unlike papillitis)
- Optic neuritis (papillitis) presents with painful loss of vision, RAPD and disc swelling (or retrobulbar with normal disc); associated with multiple sclerosis
- Pterygium is a triangular fibrovascular growth from the conjunctiva onto the cornea; common in tropical climates (UV exposure)
- Trachoma is caused by Chlamydia trachomatis (serotypes A-C); WHO SAFE strategy: Surgery, Antibiotics (azithromycin), Facial cleanliness, Environmental improvement
- Herbert pits (cicatrised follicles at the superior limbus) and Arlt line (linear scar on superior tarsal conjunctiva) are sequelae of trachoma
- Spring catarrh (vernal keratoconjunctivitis) shows cobblestone papillae on upper tarsal conjunctiva and Horner-Trantas dots at the limbus
- Sympathetic ophthalmia is a bilateral granulomatous uveitis following penetrating injury to one eye; the injured eye is the exciting eye
- Enucleation of the exciting eye within 2 weeks of injury can prevent sympathetic ophthalmia
- Retinitis pigmentosa presents with night blindness, progressive visual field constriction, bone-spicule pigmentation on fundoscopy and reduced ERG
- Xerophthalmia classification: X1A (conjunctival xerosis), X1B (Bitot spots), X2 (corneal xerosis), X3A (corneal ulceration < 1/3), X3B (keratomalacia >= 1/3), XN (night blindness), XF (fundal changes), XS (corneal scars)
- Horner syndrome: miosis, ptosis, enophthalmos and anhydrosis; caused by interruption of the sympathetic chain
- Central serous chorioretinopathy: serous detachment of the neurosensory retina at the macula; common in young males under stress; usually self-limiting
How to use these one-liners
Focus on the triad of presentation-diagnosis-management for each condition. Ophthalmology questions in NEET PG are heavily clinical -- the examiner describes a fundoscopy finding or a clinical scenario and expects you to identify the condition and its management.
Pay special attention to causes of sudden painless loss of vision (CRAO, CRVO, retinal detachment, vitreous haemorrhage) vs sudden painful loss of vision (acute angle-closure glaucoma, acute anterior uveitis, endophthalmitis).
Key mnemonics
Psammoma bodies in the eye = meningioma (optic nerve sheath); but cherry-red spot = CRAO or storage diseases (Tay-Sachs, Niemann-Pick).
Marcus Gunn = afferent defect (optic nerve); Argyll Robertson = light-near dissociation (neurosyphilis); Adie = tonic pupil (young women).
Diabetic retinopathy progression: Microaneurysms first, then Hard exudates, Dot-and-blot haemorrhages, Cotton-wool spots (pre-proliferative), Neovascularisation (proliferative).
Revision schedule
Ophthalmology is compact enough to revise every 3-4 days. Focus one session on glaucoma and cataract, another on retinal diseases and a third on cornea and neuro-ophthalmology. In the last week, review the entire set daily with special attention to fundoscopy findings and differential diagnoses of leukocoria.
Frequently Asked Questions
How many ophthalmology questions appear in NEET PG?
Typically 8-12 questions. Glaucoma, diabetic retinopathy, cataract types and neuro-ophthalmology (visual field defects, pupillary reflexes) are the most commonly tested areas.
Do I need to know surgical techniques in detail?
Know the basic principles: phacoemulsification for cataract, laser iridotomy for angle closure, PRP for proliferative diabetic retinopathy. Detailed surgical steps are rarely asked.
Are fundoscopy images asked in the exam?
Yes, image-based questions are increasingly common. Be able to identify papilloedema, diabetic retinopathy, CRAO cherry-red spot and retinitis pigmentosa from fundus photographs.
How important is neuro-ophthalmology?
Very important. Visual field defects, pupillary abnormalities and cranial nerve palsies affecting the eye are high-yield topics that overlap with neurology and medicine.
Inside MedNext for this topic
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