Medical Mnemonics
Ophthalmology Mnemonics
Ophthalmology is a pattern-recognition speciality where a handful of danger signs decide who is referred within the hour. The mnemonics here anchor the red-eye warning features, the grading systems and the anatomy that examiners test repeatedly. They also cover the sight-threatening emergencies, from acute angle closure to chemical injury, where the correct first move matters more than the eventual diagnosis. Use each acronym to hold a list you already understand: know why leukocoria demands exclusion of retinoblastoma, then let the phrase remind you at the slit lamp. Every entry maps to a core NMC competency and to everyday clinical decisions.
MedNext Academy | 3 min read
Clinically reviewed by Dr Shameer Deen, MBBS, MS, MRCS
Ophthalmology Mnemonics
Ophthalmology is a pattern-recognition speciality where a handful of danger signs decide who is referred within the hour. The mnemonics here anchor the red-eye warning features, the grading systems and the anatomy that examiners test repeatedly. They also cover the sight-threatening emergencies, from acute angle closure to chemical injury, where the correct first move matters more than the eventual diagnosis. Use each acronym to hold a list you already understand: know why leukocoria demands exclusion of retinoblastoma, then let the phrase remind you at the slit lamp. Every entry maps to a core NMC competency and to everyday clinical decisions.
Ophthalmology is a pattern-recognition speciality where a handful of danger signs decide who is referred within the hour. The mnemonics here anchor the red-eye warning features, the grading systems and the anatomy that examiners test repeatedly. They also cover the sight-threatening emergencies, from acute angle closure to chemical injury, where the correct first move matters more than the eventual diagnosis. Use each acronym to hold a list you already understand: know why leukocoria demands exclusion of retinoblastoma, then let the phrase remind you at the slit lamp. Every entry maps to a core NMC competency and to everyday clinical decisions.
Mnemonics and expansions
- RSVP: Reduced vision, Severe pain, Violaceous (ciliary) flush, Photophobia. Four red-eye danger signs that need urgent referral rather than reassurance.
- NO SPECS: No signs, Only lid signs, Soft tissue involvement, Proptosis, Extraocular muscle involvement, Corneal involvement, Sight loss. The Werner grading of thyroid eye disease severity, from mild to sight-threatening.
- SAFE: Surgery, Antibiotics, Facial cleanliness, Environmental improvement. The WHO strategy for controlling and eliminating trachoma.
- Leukocoria = retinoblastoma: A white pupillary reflex in a child means retinoblastoma until proven otherwise. Other causes include congenital cataract and Coats disease, but the life-threatening one is excluded first.
- Cherry-red spot: Central retinal artery occlusion; also seen in Tay-Sachs, Niemann-Pick and Gaucher disease. A pale ischaemic retina makes the thin fovea stand out red at the macula.
- 4-2-1 rule: Haemorrhages in 4 quadrants, venous beading in 2 quadrants, or intraretinal microvascular abnormality in 1 quadrant. Any one finding defines severe non-proliferative diabetic retinopathy.
- SO4 LR6, rest 3: Superior oblique by the trochlear nerve (CN4), lateral rectus by the abducens (CN6), all other extraocular muscles by the oculomotor nerve (CN3). The cranial nerve supply of the extraocular muscles.
- Chalazion vs stye: Chalazion: chronic, hard, painless lipogranuloma; stye: sudden, tender, yellow-pointing, red. Distinguishes a meibomian lipogranuloma from an acutely infected hordeolum.
- STAMP: Steamy cornea, Tonometry high, Anterior chamber shallow, Mid-dilated fixed pupil, Pain with vomiting. The presentation of acute angle-closure glaucoma, an ocular emergency.
- IRRIGATE: Immediate irrigation before examination after a chemical eye injury. Start within seconds and continue for at least 30 minutes; alkali burns are worse than acid.
- Pterygium crosses, pinguecula stays: Pterygium advances onto the cornea across the limbus; pinguecula remains on the conjunctiva. Crossing the limbus is the distinguishing feature.
- Papilloedema = Pressure, Papillitis = Pain: Papilloedema is bilateral from raised intracranial pressure; papillitis is usually unilateral optic nerve inflammation. Both swell the disc, but papillitis loses vision early and shows a relative afferent pupillary defect.
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