The main factor affecting depth of focus is ________.

A) convergence
B) accommodation
C) the shape of the lens
D) the size of the lens
E) the size of the pupil

Depth of Focus

The range within which an image can be moved away from or closer to a lens without significantly affecting its sharpness.

Accommodation

Ability of electrically excitable tissues, such as nerve or muscle cells, to adjust to a constant stimulus so that the magnitude of the local potential decreases through time; also called adaptation.

Convergence

The tendency of unrelated animals and plants to evolve superficially similar characteristics under similar environmental conditions or the movement of eyes inward towards the nose.