What do you mean by optical center
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medical Definition of optical center. : a point on the axis of a lens that is so located that any ray of light passing through it in passing through the lens suffers no net deviation and that may be within, without, or on either surface of the len
XDCoolBro:
deviation occur in sphectrum
I think, it's correct if you have some doubt and please refer to other sources
in lense it is callef refrection
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