Quiz 1

Question 1

What contribution did Ben Franklin give to the optical profession?

Answer 1

A. invented meniscus lenses

B. invented periscopic lenses

C. invented single vision lenses

D. invented bifocal lenses *

Question 2

Define the nominal lens power formula.

Answer 2

A. F2 + F1 = F Total

B. F1 + F2 = F Total *

C. F Total = F1 - F2

Question 3

The index of refraction of crown glass is:

Answer 3

A. 1.532

B. 1.523 *

C. 1.49

D. 1.352

Question 4

Label the following lens diagram as to lens design.

Answer 4

A. meniscus *

B. periscopic

C. myopic plus

D. hyperopic minus

Question 5

Label the following lens diagram as to lens design.

Answer 5

A. meniscus convex

B. meniscus concave

C. periscopic convex

D. periscopic concave *

Question 6

Label the following lens diagram as to lens design and nominal power.

Answer 6

A. pl cc/-2.75 *

B. pl cx/-2.75

C. pl cc/plano

D. pl cx/plano

Question 7

Label the following lens diagram as to lens design and nominal power.

Answer 7

A. meniscus cc/-4.00 *

B. periscopic cc/-4.00

C. meniscus cx/+4.00

D. periscopic cx/+4.00

Question 8

Using the nominal lens power formula, calculate the total lens power having a front surace curve of +6.00 and a back surface curve of -3.00.

Answer 8

A. +9.00

B. -3.00

C. +3.00 *

D. +6.00

Question 9

Label the following lens diagram as to lens design.

Answer 9

A. meniscus convex

B. meniscus concave

C. periscopic convex *

D. periscopic concave

Question 10

Label the following lens diagram as to lens design and nominal power.

Answer 10

A. equiconcave/+6.00

B. equiconvex/+6.00 *

C. meniscus cc/-6.00

D. meniscus cx/-6.00