di·op·tric adj \(ˈ)dī-ˈäp-trik\
: producing or serving in refraction of a beam of light : refractive; specifically : assisting vision by refracting and focusing light <the dioptric power of a lens>
: produced by means of refraction <dioptric images>
—di·op·tri·cal·ly \-tri-k(ə-)lē\ adverb
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