The process ________ is reflexive in nature and combines changes in the size of the pupil,the curvature of the lens,and the convergence of the optic axes to keep the image in the same place on both retinae.

Reflexive Nature

Characteristic of an action or process taking place automatically as a reaction to a stimulus, without conscious thought.

Pupil

The adjustable opening in the center of the eye through which light enters.

Optic Axes

Imaginary lines that pass through the optical center of a lens or optical system, indicating the direction along which light travels through the system.