Definition of dioptrics noun from the Oxford Advanced Learner's Dictionary

 

dioptrics

 noun
noun
BrE BrE//daɪˈɒptrɪks//
 
; NAmE NAmE//daɪˈɑːptrɪks//
 
[uncountable](physics)
 
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the scientific study of refraction (= the way light changes direction when it goes through glass, etc.)
See the Oxford Advanced American Dictionary entry: dioptrics