CO CO Optical Devices & Low Vision Rehabilitation

Question 1

Low vision is generally defined as best-corrected visual acuity of:

Accepted Answer

20/70 or worse in the better eye

Answer

Better than 20/40

Answer

20/40 in either eye

Answer

Less than 20/200 exclusively

Question 2

Fresnel press-on prisms incorporated into a spectacle lens are primarily used to manage:

Accepted Answer

Diplopia caused by strabismus

Answer

Presbyopia

Answer

Myopic astigmatism

Answer

Color vision deficiency

Question 3

Which low vision device uses a strong convex lens resting on reading material to magnify near objects?

Accepted Answer

Stand magnifier

Answer

Galilean telescope

Answer

Reverse telescope

Answer

Prism half-glasses

Question 4

When prescribing base-out prism for a patient with esotropia and diplopia, the prism functions by:

Accepted Answer

Redirecting the visual axis nasally to align the diplopic images

Answer

Increasing the angle of deviation

Answer

Reducing accommodative effort

Answer

Expanding the peripheral visual field

Question 5

Bioptic telescopes are primarily prescribed to:

Accepted Answer

Allow patients with low vision to meet driving visual acuity requirements

Answer

Treat amblyopia in children

Answer

Improve stereoacuity

Answer

Eliminate diplopia at near

Question 6

According to Prentice's Rule, the prismatic effect in prism diopters equals:

Accepted Answer

Lens power in diopters multiplied by decentration in centimeters

Answer

Lens power divided by decentration in cm

Answer

Lens power squared

Answer

Decentration in mm divided by lens power