Practice Exam

Question 1

Visible light is in the range of wave lengths approximately:

a. 200 to 380 nanometers
b. 200-700 nanometers
c. 380 to 760 nanometers
d. 400 to 600 nanometers

Answer 1

380 to 760 nanometers

Question 2

The reason that you see a red color when you look at a red rose is that:

a. Red waves are refracted by the rose
b. Red waves are reflected from the rose while all other colors are absorbed
c. Red waves are absorbed as the roses and all others are reflected
d. Red waves are longer so they are dispersed evenly across the petals

Answer 2

Red waves are reflected from the rose while all other colors are absorbed

Question 3

Put the following in correct prescription notation:

a. +5.00 -.50 x 145
b. 3.00 +0.25 x010
c. -4.00 -1.00 x12
d. +1 -2 x 5

Answer 3

+5.00 -0.50 X 145
+/-3.00 +0.25 x 010
-4.00 -1.00 x 012
+1.00 -2.00 x 005

Question 4

List the characteristics of a plus cylindrical lens:

Answer 4

Thick center / thin edge, converges light, against motion, magnifies, corrects hyperopia, scissor effect

Question 5

Define abbe value and why is it important.

Answer 5

Number assigned to a lens material - the higher the number the less chromatic aberration they have

Question 6

Given the following Rx: +1.25 -0.50 x 010
 Transpose Rx: +0.75 +0.50 x 100
Place on an optical Cross:
                  \+0.75      100
          I
          L\_\_\_\_\_\_\_    +1.25   010
Name the refractive error:

Answer 6

Compound hyperopic astigmatism

Question 7

• 2.50 high index lass lens is heavier than a crown glass lens of equal thickness.
  a. True
  b. False

Answer 7

True

Question 8

Arrange these materials in order from the material with the highest index of refraction to the material with the lowest index of refraction:

a. Crown glass
b. Polycarbonate
c. CR-39
d. Trivex
e. Thin & lite 1.71

Answer 8

Cr-39
Crown glass
Trivex
Polycarbonate
Thin & lite 1.71

Question 9

What is the minimum thickness requirement mandated for dress eyewear?

a. 1.0 mm
b. 1.5 mm
c. 2.0 mm
d. 3.0 mm
e. No minimum

Answer 9

No minimum

Question 10

Which agency mandates the impact resistance for lenses?

a. ANSI
b. FDA
c. FTC
d. OSHA

Answer 10

FDA

Question 11

Eyeglasses II no longer lists the minimal information needed for a spectacle lens prescription as found in Eyeglasses I:

a. True
b. False

Answer 11

True

Question 12

The “duty to inform” someone of the safest options for their eyewear needs is:

a. A legal responsibility
b. A professional responsibility
c. Both

Answer 12

A professional responsibility

Question 13

What are the basic-impact safety eyewear minimum thickness?

a. 2.0 mm
b. 2.2 mm
c. 3.0 mm
d. 3.2 mm

Answer 13

3.0 mm

Question 14

How must a safety frame suitable for high impact safety lenses be marked on the front and the temples?

a. Size and manufacturer
b. Size, manufacturer and Z87
c. Size, manufacturer and Z87+
d. Size, manufacturer and Z87-2

Answer 14

Size, manufacturer and Z87-2

Question 15

Which muscle is responsible for turning the eye towards the nose?

a. Inferior rectus
b. Lateral rectus
c. Medial rectus
d. Superior rectus

Answer 15

Medial rectus

Question 16

What are the three general eyewear categories?

Answer 16

Dress, safety, sports

Question 17

What are two disadvantages of glass lenses?

Answer 17

Heavyweight and doesn’t tint

Question 18

Lens material classified by index of refraction, what are these classifications?

Answer 18

Low index, mid index, high index, ultra high index

Question 19

What are the FDA regulations for dispenser record keeping?

Answer 19

Record must be kept for three years

Question 20

Explain why polycarbonate is a high impact resistant material.

Answer 20

The nature of the material is softer so it will bend before breaking

Question 21

For which patient groups is visual safety a major concern?

Answer 21

Monocular individuals, athletes, children certain occupations, people that have had ocular surgeries or traumas

Question 22

Given:
+2.00 x 110

                   L\_\_\_\_\_\_\_  +4.00 x 20

1. Write Rx in minus cylinder form:
2. Name the refractive error:

Answer 22

1. +4.00 -2.00 X 020

2. Compound hyperopic astigmatism

Question 23

Write Rx to correct:

a. Myopia:
b. Simple hyperopic astigmatism:

Answer 23

a. -4.00 Sph

b. PL -1.00 x 045

Question 24

Transpose the following:

a. -1.50 +1.00 x 035
b. +2.00 -3.00 x 165

Answer 24

a. +0.50 -1.00 x 145

b. -1.00 +3.00 x 175

Question 25

Name another lens material besides polycarbonate that are also impact resistant:

Answer 25

Trivex, NXT

Question 26

What are the three things that can happen to a ray of light?

Answer 26

Reflected, refracted, absorbed

Question 27

What is the law of refraction?

Answer 27

Angle of incidence equals angle of reflection

Question 28

What are the three laws of refraction?

Answer 28

When a ray passes through a medium perpendicular to the surface, it slows down
Goes from less dense to more dense, bends towards the normal
Goes from more dense to less dense, bends away from the normal

Question 29

We use the acronym ROY G BIV to help remember the order of the colors. It lists colors that have wavelengths from-to:

a. Long wavelength (Around 700nm) to short wavelength (around 400nm)
b. Short wavelength (around 400nm) to long wavelength (around 700nm )

Answer 29

Long wavelength (Around 700nm) to short wavelength (around 400nm)

Question 30

Which wave length of ultra-violet radiation is absorbed by the ozone layer?

a. UV-A
b. UV-B
c. UV-C

Answer 30

UV-C

Question 31

What is the optician’s responsibility in regards to inspecting newly made eyeglasses?

Answer 31

All factors of the Rx are to be checked. If an eye injury occurs and any standards are not met, the Rx wasn’t inspected and/or was fabricated incorrectly