Visual impairment and development — formative SAQs

SAQ 1 (10)

A term 8-week-old is brought because “he does not look at me.” Birth was uncomplicated. Examination shows no social visual fixing. The red reflex is white on the left and dull on the right. [1] [2]

1. State your problem representation and the single most important immediate bedside finding. (3) [2]
2. Explain why early dense media opacity threatens cortical development. (3) [4]
3. Outline your next steps, including referral urgency and what you tell the family. (4) [1] [2] [4]

Model answer

Problem representation. Eight-week-old with absent visual social fixing and abnormal bilateral red reflexes — suspected media opacity/cataract pathway until proven otherwise; this is an urgent sensory emergency, not a routine developmental wait. The single most important bedside finding is the abnormal red reflex (white/dull), which mandates urgent ophthalmology. [1] [2]

Critical period. Focused retinal images are required for visual cortex development. Dense early cataract creates deprivation amblyopia through unequal or absent cortical competition; delay permanently reduces recoverable acuity. [4]

Plan. Same-day/urgent paediatric ophthalmology pathway; do not defer for “watchful waiting” or primary-care bloods; explain leukocoria/media-opacity concern in plain language without false reassurance; document handoff; after specialty care, plan amblyopia management and developmental surveillance. [1] [2] [4]

SAQ 2 (10)

A 5-year-old with cerebral palsy and known PVL is referred for “poor attention.” Structural eye examination is reported as near-normal. Teachers say he freezes in busy corridors and cannot find a pencil on a patterned desk. [3] [5] [6]

1. What diagnosis pattern should you prioritise and why? (3) [3] [5]
2. List three functional assessment features that support this pattern. (3) [3]
3. Outline a multidisciplinary management plan beyond refraction alone. (4) [6]

Model answer

Pattern. Cerebral visual impairment (CVI) on a brain-injury background: eyes may look structurally normal while dorsal/ventral stream processing fails. Autism or “behaviour” labels must not cancel vision assessment, and dual diagnoses can coexist. [3] [5]

Functional features. Crowding intolerance; impaired visual guidance of movement/navigation; better performance with single high-contrast targets in quiet settings; difficulty locating objects on complex backgrounds. [3]

Plan. Confirm ophthalmology review and refraction; environmental simplification; CVI-informed teaching strategies; orientation and mobility; early intervention/OT as indicated; school accommodations; family education that “normal eye exam” ≠ normal functional vision; follow developmental progress. [6]