ocular

Short definition from Wiktionary

Adjective

1. 1
   Of, or relating to the eye, or the sense of sight
2. 2
   Resembling the eye.
3. 3
   Seen by, or seeing with, the eye; visual.

Noun

1. 1
   The eyepiece of a microscope or other optical instrument, i.e., the optical element closest to the eye.
2. 2
   Any of the scales forming the margin of a reptile's eye.