Answer: refracts

AnswerCrossword Clue
REFRACTSBends, as light
REFRACTSWhat an ophthalmologist does
refractsREFRACT, to deflect in a particular manner, as a ray of light
refractsMeasure the focusing characteristics of (an eye) or of the eyes of (someone)
refracts(of water, air, or glass) Make (a ray of light) change direction when it enters at an angle