Accomodation: There are neurological inputs to the eye which can cause the lens to alter it focus. You probably are calling into play 'accomodation' which can do this. This is a normal reflex and like many controllable reflexes, can be exercised more with practice although i don't think it has a practical value.
Answered 12/27/2020
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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