Ophthalmic OpticsQuestion 7 of 100
What is the total power of a lens with a front surface of +6.00 D and a back surface of -2.00 D (thin lens approximation)?
a.+4.00 D
b.+8.00 D
c.-4.00 D
d.+3.00 D
Explanation
For a thin lens, total power is the algebraic sum of the front and back surface powers. +6.00 + (-2.00) = +4.00 D.
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