Quiz 2

Question 1

Applying the concept of corrected curve lens theory, choose the best base curve for the following:

+6.00-2.00 x 90

Answer 1

A. +12.00

B. +11.00 *

C. +10.00

D. +9.00

Question 2

Applying the concept of corrected curve lens theory, choose the best base curve for the following:

-1.00-6.00 x 90

Answer 2

A. +6.00

B. +5.00

C. +4.00 *

D. +3.00

Question 3

Answer 3

A. –3.00 at 90 +1.50 x 180

B. –3.00 at 90 -1.50 x 180 *

C. –1.50 at 90 -1.50 x 180

D. –1.50 at 90 -3.00 x 180

Question 4

Answer 4

A. -1.50 +4.00 x 180

B. +2.50 -4.00 x 90

C. 1 and 2 *

D. neither Rx is correct

Question 5

Crown glass is clear, ophthalmic glass and has an index of refraction of 1.49.

Answer 5

True

False *

Question 6

All of the following are advantages of plastic lenses except:

Answer 6

A. light weight

B. tints easily

C. scratches easily *

D. good optics

Question 7

Transpose the following Rx:
Plano –2.00 x 180

Answer 7

A. plano + 2.00 x 180

B. plano –2.00 x 180

C. –2.00 –2.00 x 90

D. –2.00 +2.00 x 90 *

Question 8

Answer 8

A. Plano at 135 -2.00 x 45 *

B. Plano at 45 -2.00 x 135

C. –2.00 at 45 +2.00 x 135

D. –2.00 at 135 +2.00 x 45

Question 9

Transpose the following Rx:
+10.50 +0.75 x 25

Answer 9

A. +11.25 –0.75 x 115 *

B. +10.50 –0.75 x 25

C. +10.50 –0.75 x 115

D. +11.25 –0.75 x 25

Question 10

Applying the concept of corrected curve lens theory, choose the best base curve for the following:
Applying for Ashperic Lenses:

+4.00 aspheric

Answer 10

A. +10.00

B. +8.00 *

C. +6.00

D. +4.00

Question 11

All of the following are characteristics of plus lenses except:

Answer 11

A. Converge light

B. Virtual focus *

C. Thicker at the center, thinner at the edges

D. Shows against motion

E. Effective Power Increases as the Vertex Distance Increases

Question 12

Answer 12

A. -3.50 -3.50 x60

B. -3.50 +3.50 x60

C. plano -3.50 x150

D. 1 and 2

E. 2 and 3 *

Question 13

Transpose the following Rx:
-3.75 +1.25 x 45

Answer 13

A. –2.00 –1.25 x 135

B. +2.00 –1.25 x 45

C. –2.50 –1.25 x 135 *

D. +2.50 +1.25 x 45

Question 14

All of the following are characteristics of minus lenses except:

Answer 14

A. Diverge Light

B. Virtual Focus

C. Thinner at center, thicker at the edges

D. Minify Image

E. Effective power Increases as the Vertex Distance Increases *

F. Shows with motion

Question 15

Transpose the following Rx:
+2.50 –0.75 x 175

Answer 15

A. +1.75 +0.75 x 175

B. +1.75 +0.75 x 85 *

C. +2.50 +0.75 x 85

D. +2.50 –2.50 x 175

Question 16

Answer 16

A. -0.12 -0.37 x180 *

B. -0.50 -1.37 x90

C. +0.50 -0.37 x90

D. -0.12 +0.37 x180

Question 17

Applying the concept of corrected curve lens theory, choose the best base curve for hte following:

-6.00 -2.00 x90 ASHPERIC Lenses

Answer 17

A. +2.50

B. +1.50

C. +1.00

D. +0.50 *

Question 18

The PRINCIPAL AXIS is an imaginary line that is perpendicular to the lens surface and where light passes through undeviated.

Answer 18

True *

False

Question 19

CR-39 Stands for Columbia Resin’s 39th formula, and it what we refer to as plastic.

Answer 19

True *

False

Question 20

Answer 20

A. +4.00 at 90 -2.00 at 180

B. +2.00 at 90 +4.00 at 180

C. +2.00 at 90 +2.00 at 180

D. +4.00 at 90 +2.00 at 180 *

Question 21

Spectacle lenses are prescribed for 4 reasons: refractive errors, faulty binocular vision, protection and comfort.

Answer 21

True *

False

Question 22

The OPTICAL CENTER is the point on a lens through which a ray of light bends toward the base.

Answer 22

True

False *

Question 23

Applying the concept of corrected curve lens theory, choose the best base curve for the following:

+1.00 sphere

Answer 23

A. +10.00

B. +9.00

C. +8.00

D. +7.00 *

Question 24

Transpose the following Rx:
+4.00 –1.37 x 62

Answer 24

A. +2.63 +1.37 x 162

B. +2.63 +1.37 x 152

C. +2.62 +1.37 x 152 *

D. +2.62 +1.37 x 62

Question 25

Applying the concept of corrected curve lens theory, choose the best base curve for the following:

-1.00

Answer 25

A. +6.00

B. +5.50 *

C. +5.00

D. +4.50