Visual Assessment

Question 1

Which statement correctly refers to the letters on the Snellen chart?

A. Because they subtend the same amount of arc, each letter is equally recognizable.

B. Even though they each subtend the same amount of arc, some letters are easier to recognize than others.

C. Different letters, subtend different amounts of arc, yet each letter is equally recognizable.

D. Different letters, subtend different amounts of arc; thus some letters are easier to recognize than others.

Answer 1

B. Even though they each subtend the same amount of arc, some letters are easier to recognize than others.

Question 2

If a person is able to clearly see an object at 20 feet that can be seen at 60 feet by a person with no refractive error, their visual acuity is said to be

A. 20/20
B. 20/40
C. 20/60
D. 20/80

Answer 2

C. 20/60

Question 3

What is the recommended distance used for assessing distance acuity?

A. 3’
B. 10’
C. 20’
D. 40’

Answer 3

C. 20’

Question 4

If poor vision is simply due to refractive error, the acuity should improve with use of a(n)

A. Placido disc
B. Pinhole disc
C. Occluder over non-dominant eye
D. Occluder over dominant eye

Answer 4

B. Pinhole disc

Question 5

Near vision chart should be held how many inches from the eye?

A. 10– 12
B. 14–16
C. 18–20
D. 22–24

Answer 5

B. 14–16

Question 6

Measuring visual acuity with a potential acuity meter is useful in patients with

A. Glaucoma
B. Cataracts
C. Optic neuritis
D. Angle related macular degeneration

Answer 6

B. Cataracts

Question 7

In an industrial industry in which the patient complains of a foreign body sensation, a 20/60 vision is recorded by the assistant. What is the next step the assistant should take?

A. Instill a fluorescein dye
B. Patch the eye
C. Return the patient to the waiting room
D. Try a pinhole test to see if vision will improve

Answer 7

D. Try a pinhole test to see if vision will improve

Question 8

An effective measure of estimating visual acuity in infants would be to use

A. An amblyoscope
B. Preferential looking
C. Prism bars
D. A Snellen Chart

Answer 8

B. Preferential looking

Question 9

20/60 visual acuity means the patient sees a test object at

A. 6 meters that someone with 20/20 vision would see at 20 feet

B. 20 feet that someone with 20/20 vision would see at 60 feet

C. 20 feet that someone with 20/20 vision would see at 60 meters

D. 60 feet that someone with 20/20 vision would see at 20 feet

Answer 9

B. 20 feet that someone with 20/20 vision would see at 60 feet

Question 10

Which of the following is a measure of distance of visual acuity?

A. 20/20
B. 40 arc seconds
C. D-15
D. Jaeger 2

Answer 10

A. 20/20

Question 11

Which of the following equivalencies is correct?

A. 5/200 is equivalent to 20/400
B. 6/60 is equivalent to 3/120
C. 10/200 is equivalent to 20/100
D. 20/200 is equivalent to 10/100

Answer 11

D. 20/200 is equivalent to 10/100

Question 12

What is a probable cause of blurred distance vision that is improved by squinting?

A. Esotropia
B. Glaucoma
C. Uncorrected myopia
D. Uncorrected presbyopia

Answer 12

C. Uncorrected myopia