Quiz 8 - Finishing

Question 1

Which is not a step of the finishing process?

a. Generation
b. Edging
c. Verification
d. Tinting

Answer 1

a. Generation

Question 2

All horizontal decentration calculations are referenced from the frame’s

a. DBL
b. DBC
c. PRP
d. ED

Answer 2

b. DBC

Question 3

Rimless frames use lenses with which bevel type?

a. Grooved
b. Hide-a-bevel
c. Flat bevel
d. 1/3 - 2/3 “V” bevel
e. Standard “V” bevel

Answer 3

c. Flat bevel

Question 4

Choose the correct answer related to lens verification and inspection

a. We need only to inspect the lens power after surfacing
b. Verifying the axis of the Rx is done only after the job is complete.
c. We must verify all lens parameters included power, axis, surface quality and thickness
d. Inspection of the lens thickness is not necessary

Answer 4

c. We must verify all lens parameters included power, axis, surface quality and thickness

Question 5

Decentration of lenses is always “IN”

a. True
b. False

Answer 5

b. False

Question 6

Vertical decentration is sometimes necessary for SV lenses

a. True
b. False

Answer 6

a. True

Question 7

The point on the lens around which the lens is cut and edged

a. Geometric Center
b. Optical Center
c. Distance Between Centers
d. Mechanical Center
e. Prism Reference Point

Answer 7

d. Mechanical Center

Question 8

The inset of a lens (or lens segment) corresponds to:

a. The patient’s convergence
b. The frame DBC
c. The lens PRP
d. The patient’s distance PD

Answer 8

a. The patient’s convergence

Question 9

Edging is the lab process that:

a. Removes generator marks for the lens surface
b. Smoothes the lens surface for clarity
c. Makes the lens impact resistant
d. Creates the power and thickness of the lens
e. Creates the size and shape of the lens

Answer 9

e. Creates the size and shape of the lens

Question 10

The edging block center is placed at the _______ of the lens.

a. Nasal edge
b. PRP
c. Mechanical Center
d. Geometric Center

Answer 10

c. Mechanical Center

Question 11

If the lensmeter mires are off center, you should check:

a. Reticle Focus
b. Power Drum
c. Prism Compensating Device / Auxiliary Prism Rings
d. Lensmeter turned on
e. Axis wheel on 180

Answer 11

c. Prism Compensating Device / Auxiliary Prism Rings

Question 12

The center dot from the lensmeter will always mark the ________ .

a. OC
b. Axis
c. GC
d. PRP

Answer 12

d. PRP

Question 13

When the lensmeter mires are focused with no lens in place, properly callibrated, the power drum should read…

a. Plano
b. +.25
c. -.25
d. +1.00

Answer 13

a. Plano

Question 14

Patternless edgers can only accept tracings from full frames with full eye wires.

a. True
b. False

Answer 14

b. False

Question 15

Pattern nasal position on the edger is crucial to proper edging of lenses.

a. True
b. False

Answer 15

a. True

Question 16

Calculate the decentration: A=50 DBL=20 B=37 ED=53 Patient PD = OD 32 OS 33

a. OD = 3out / OS = 2out
b. OD = 3in / OS = 2in
c. OD = 1in / OS = 3in
d. No decentration required

Answer 16

b. OD = 3in / OS = 2in

Question 17

Vertical decentration refers to which measurement?

a. A
b. ED
c. DBL
d. B

Answer 17

d. B

Question 18

Which of the following can give an approximately lens power?

a. PD stick
b. Calipers
c. Polariscope
d. Lens Clock

Answer 18

d. Lens Clock