Source : Webster's Revised Unabridged Dictionary (1913)

Ocular \Oc"u*lar\, a. [L. ocularis, ocularius, fr. oculus the
   eye: cf.F. oculaire. See {Eye}, and cf. {Antler},
   {Inveigle}.]
   1. Depending on, or perceived by, the eye; received by actual
      sight; personally seeing or having seen; as, ocular proof.
      --Shak.

            Thomas was an ocular witness of Christ's death.
                                                  --South.

   2. (Anat.) Of or pertaining to the eye; optic.

Ocular \Oc"u*lar\, n. (Opt.)
   The eyepiece of an optical instrument, as of a telescope or
   microscope.

Source : WordNet®

ocular
     adj 1: of or relating to or resembling the eye; "ocular muscles";
            "an ocular organ"; "ocular diseases"; "the optic (or
            optical) axis of the eye"; "an ocular spot is a
            pigmented organ or part believed to be sensitive to
            light" [syn: {optic}, {optical}, {opthalmic}]
     2: relating to or using sight; "ocular inspection"; "an optical
        illusion"; "visual powers"; "visual navigation" [syn: {optic},
         {optical}, {visual}]
     3: able to be seen; "be sure of it; give me the ocular proof"-
        Shakespeare; "a visual presentation"; "a visual image"
        [syn: {visual}]

ocular
     n : combination of lenses at the viewing end of optical
         instruments [syn: {eyepiece}]