Quiz - Inspect, Verify RGP Sph Lenses

Question 1

The primary instrument for measuring the BC/CPC of a RGP lens is:

a. The Lensometer
b. The Shadowgraph
c. The Keratometer
d. The Radiuscope

Answer 1

d. The Radiuscope

Question 2

The ANSI standard for base curve on an RGP is?

a. .02
b. .05
c. .01
d. .5

Answer 2

b. .05

Question 3

Increasing the thickness of the lens will reduce lens flexure?

a. True
b. False

Answer 3

a. True

Question 4

What is another name for a Lensometer:

a. Focimeter
b. Microscope
c. Michropheremeter
d. Shadowgraph

Answer 4

a. Focimeter

Question 5

What lens is used to increase the range of the Keratometer by 9 diopters

a. -1.00
b. -1.25
c. +1.25
d. +1.00

Answer 5

c. +1.25

Question 6

A measuring magnifier can check all the following except:

a. Edge chips
b. Power
c. Optical Zone
d. Scratches

Answer 6

b. Power

Question 7

Dial lens gauge is use to measure:

a. Lens center thickness
b. Corneal thickness
c. Tear thickness
d. All of the above

Answer 7

a. Lens center thickness

Question 8

Which instrument measures the lens power?

a. Focimeter
b. The Radiuscope
c. Keratometer
d. Microscope

Answer 8

a. Focimeter

Question 9

The V Gauge measures:

a. The OC
b. The OZ
c. Diameter
d. Power

Answer 9

c. Diameter

Question 10

The actual refracting power of an RGP can be measured 2 ways. The Posterior Vertex power known as (BVP) and the Anterior Vertex power (FVP)

a. True
b. False

Answer 10

a. True