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

Low vision is defined as best-corrected visual acuity of 20/70 or worse in the better eye that cannot be improved with standard optical correction.

Question 2

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

Accepted Answer

Diplopia caused by strabismus

Answer

Fresnel press-on prisms are used to neutralize diplopia by redirecting the visual axis in patients with strabismus, especially when deviation may change over time.

Question 3

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

Accepted Answer

Stand magnifier

Answer

Stand magnifiers use a strong convex lens mounted at a fixed focal distance and rest directly on reading material to provide stable near magnification.

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

Base-out prism redirects the visual axis nasally, compensating for esotropia and aligning the diplopic images to eliminate double vision.

Question 5

Bioptic telescopes are primarily prescribed to:

Accepted Answer

Allow patients with low vision to meet driving visual acuity requirements

Answer

Bioptic telescopes are miniature telescopes mounted superiorly in spectacle lenses that allow patients with low vision to spot-check acuity for driving in states that permit bioptic driving.

(CO) Certified Orthoptist Practice Test

(CO) Certified Orthoptist Practice Test

CO CO Optical Devices & Low Vision Rehabilitation