Non-optical

[op-ti-kuh l] /ˈɒp tɪ kəl/

adjective
1.
of, relating to, or applying or the principles of optics.
2.
constructed to assist sight or to correct defects in vision.
3.
of or relating to sight or vision; visual.
4.
of or relating to the eye.
5.
of or relating to an optician or opticians or to their products, especially eyeglasses:
an optical service.
6.
dealing with or skilled in optics.
noun
7.
opticals, .
/ˈɒptɪkəl/
adjective
1.
of, relating to, producing, or involving light
2.
of or relating to the eye or to the sense of sight; optic
3.
(esp of a lens) aiding vision or correcting a visual disorder
adj.

1560s, from optic + -al (1). Of abstract art, from 1964. Related: Optically.
optical
(ŏp’tĭ-kəl)

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