op·ti·cal /ˈɑptɪkəl/
 (a.)視覺的,眼睛的;光學的


 op·ti·cal /ˈɑptɪkəl/ 形容詞
 光學的,視力的,眼的,視覺的,旋光的


 optical
 光掃描器


 optical
 光 光學


 Op·tic Op·tic·al a.
 1. Of, pertaining to, or using vision or sight; as, optical illusions. [wns=2]
 Syn: -- ocular, optic, visual.
 The moon, whose orb
 Through optic glass the Tuscan artist views.   --Milton.
 2. Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina; the optic (or optical) axis of the eye. See Illust. of Brain, and Eye. [wns=3]
 3. Relating to the science of optics or to devices designed to assist vision; as, optical works; optical equipment. [wns=1]
 Optic angle Opt., the angle included between the optic axes of the two eyes when directed to the same point; -- sometimes called binocular parallax.
 Optic axis. Opt. (a) A line drawn through the center of the eye perpendicular to its anterior and posterior surfaces.  In a normal eye it is in the direction of the optic axis that objects are most distinctly seen. (b) The line in a doubly refracting crystal, in the direction of which no double refraction occurs.  A uniaxial crystal has one such line, a biaxial crystal has two.
 Optical circle Opt., a graduated circle used for the measurement of angles in optical experiments.
 Optical square, a surveyor's instrument with reflectors for laying off right angles.

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 optical
      adj 1: relating to or using sight; "ocular inspection"; "an optical
             illusion"; "visual powers"; "visual navigation" [syn:
             ocular, optic, visual]
      2: of or relating to or involving light or optics; "optical
         supplies"
      3: 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: ocular,
          optic, opthalmic]