Which of the following is a newly noted ocular sign of shunt malfunction in school-aged children?

• A. Newly noted eye squint
• B. Newly noted hearing loss
• C. Newly noted ear fullness
• D. Newly noted blurred vision

Answer: (A)

A new squint signals a problem with shunt function because raised intracranial pressure from a malfunctioning shunt can affect eye movement nerves, especially the sixth (abducens) nerve. The abducens travels a long intracranial path, making it particularly susceptible to pressure changes, so new horizontal diplopia or a misalignment of the eyes often appears first in school-aged children. This ocular sign is a practical, tangible clue that something is altering intracranial dynamics, prompting urgent evaluation of the shunt.

Hearing-related symptoms like new hearing loss or ear fullness aren’t tied to intracranial pressure changes from shunt problems, and blurred vision, while possible with raised ICP, is a less specific sign than a new squint. If a child with a ventriculoperitoneal shunt develops a new squint, it’s important to seek prompt medical assessment to check shunt function and prevent further complications.