Ophthalmic OpticsQuestion 25 of 100
The optical center of a lens is the point where what happens?
a.Maximum prism occurs
b.The cylinder axis crosses
c.Light passes with no prismatic deviation
d.The bevel is thickest
Explanation
At the optical center, light passes straight through with zero prismatic effect. Moving the line of sight away from the optical center introduces prism, per Prentice's rule.
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