Response of the pupil ?!


Question:

Response of the pupil ?

What is the response of the pupil in the right eye if the light is shone on the opposite eye?
If it affects the right eye too what is the reason. What is the mechanism behind it?


Answers:

In medicine, there are two pupillary reflexes-

The pupillary light reflex is the reduction of pupil size in response to light.
The pupillary accommodation reflex is the reduction of pupil size in response to an object coming close to the eye.
Both these reflexes affect both eyes, even if only one eye is stimulated.

The pattern of papillary response to light can help determine which of the cranial nerves is damaged. There are two types of response assessed for each eye:

Direct pupillary reflex: whether each pupil constricts with light shone into that eye
Consensual pupillary reflex: whether each pupil constricts with light shone into the other eye




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