Pupillary reflex

Although the pupillary response, in which the pupil dilates or constricts due to light is not usually called a "reflex", it is still usually considered a part of this topic.

In "the near response" there are three processes that occur to focus an image on the retina.

Because the lens cannot refract light rays at the edges well, the image produced by the lens is blurry around the edges so the pupil constricts when one attempts to focus on nearby objects.

[citation needed] Lastly, accommodation of the lens occurs.

This is an alteration in the curvature of the lens that allows focus on a nearby object.