OP'TIC,'TICAL, a. [Gr. from to see, the eye.]

1. Relating or pertaining to vision or sight.

2. Relating to the science of optics.

Optic angle, is that which the optic axes of the eyes make with one another, as they tend to meet at some distance before the eyes.

Optic axis, is the axis of the eye, or a line going through the middle of the pupil and the center of the eye.