Quiz 1 Flashcards
Label the following lens diagram as to lens design.
(select the correct response)
meniscus
periscopic
myopic plus
hyperopic minus
meniscus
Using the Nominal Lens Power formula, calculate the total lens power having a front surface curve of +6.00 and a back surface curve of -3.00.
+3.00
Label the following lens diagram as to lens design.
meniscus convex
meniscus concave
periscopic convex
periscopic concave
periscopic concave
The index of refraction of crown glass is:
1.523
Label the following lens diagram as to lens design and nominal power.
meniscus cc/-4.00
periscopic cc/-4.00
meniscus cx/+4.00
periscopic cx/+4.00
meniscus cc/ -4.00
Label the following lens diagram as to lens design and nominal power.
pl cc/-2.75
pl cx/-2.75
pl cc/plano
pl cx/plano
pl cc/ -2.75
Label the following lens diagram as to lens design.
meniscus convex
meniscus concave
periscopic convex
periscopic concave
periscopic convex
Label the following lens diagram as to lens design and nominal power.
equiconcave/+6.00
equiconvex/+6.00
meniscus cc/-6.00
meniscus cx/-6.00
equiconvex/ +6.00
Define the Nominal Lens Power Formula
F2 + F1 = F Total
F1 + F2= F Total
F Total= F1 - F2
F1 + F2 = F Total
What contribution did Ben Franklin give to the optical profession?
invented bifocal lenses