Corneal light reflex

The corneal light reflex test involves shining a light onto the child's eyes from a distance and observing the reflection of the light on the cornea with respect to the pupil. The location of the reflection from both eyes should appear symmetric and generally slightly nasal to the center of the pupil.
(A) Normal corneal reflex.
(B) Corneal light reflex in esotropia.
(C) Corneal light reflex in exotropia.