noun, plural: oculars
Eyepiece of the microscope; the lens at the end of certain optical instruments (e.g. telescopes) used to view the image of an object, scene, etc.
(1) Resembling the eye in terms of form, or function (e.g. ocular organ)
(2) Of or pertaining to the use of eyes (for sight); visual
Word origin: Latin ocularis, from oculus (eye)