Urgent ophthalmology referral and childhood vision loss: Viva

This is a branching oral built to probe the reasoning that holds the red reflex test and the same-day referral at the centre, the amblyopia sensitive period, and the red-flag presentations that drive the tier. The questions escalate from the framing to the red reflex test, the principle of the time-critical vision loss, and the specific scenarios of the orbital cellulitis, the cortical visual impairment and the raised intracranial pressure, with deliberate probes into the pitfalls and the safety-net. [4]

Opening question: framing the problem

The examiner opens with the white glow in the photograph and asks: how do you frame this problem in a single sentence, and what is your first step? [4]

A strong answer names the leukocoria as retinoblastoma or a congenital cataract until proven otherwise, confirms the finding with the red reflex test, and states that the first step is the same-day referral to the ophthalmology service. [5]

Model answer. This child has leukocoria, the white pupillary reflex, and it is retinoblastoma or a congenital cataract until proven otherwise. The first step is to confirm the finding with the red reflex test in the dim room and to refer the child the same day to the ophthalmology service, because the delay of weeks can convert the curable intraocular tumour into the lethal extraocular disease or saddle the child with the irreversible amblyopia. [4][6]

Probe one: the red reflex test

The examiner presses: describe the red reflex test, and tell me what is abnormal. [4]