optically

adverb

op·ti·cal·ly | \ ˈäp-ti-k(ə-)lē

How to pronounce optically (audio)

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Medical Definition of optically

1 : by means of sight : with or to the eye as viewed optically

2 : with reference to or by means of optics : with reference to optical properties object deformation was…measured optically— G. N. Duda et al