What reflex test assesses the ability to perceive light touch on the cornea?

The corneal reflex is specifically designed to assess the ability to perceive light touch on the cornea. When the cornea is gently stimulated, typically with a cotton swab, a normal response is involuntary blinking of the eyelids. This response involves an afferent pathway through the trigeminal nerve (cranial nerve V) which carries sensory information from the cornea to the brain, and an efferent pathway via the facial nerve (cranial nerve VII) that controls the muscles responsible for blinking.

This reflex test is essential in evaluating the sensory and motor functions related to the eye, and it can provide important information about the status of the brainstem and cranial nerve function. The other reflexes listed do not pertain to light touch on the cornea; they focus on different aspects of visual function, such as pupil reactions to light, focusing on objects at varying distances, and the alignment of the eyes.