ABO Low Vision & Rehabilitation 5

Question 1

A patient with 20/160 BCVA wants to read a medicine label with 1M print. Using the Kestenbaum rule, what approximate add power is indicated?

Accepted Answer

8D

Answer

The Kestenbaum rule estimates the required add as 1 / (distance acuity in decimal); 20/160 = 0.125 decimal, so 1/0.125 = 8D.

Question 2

Which tint color is most commonly recommended to enhance contrast and reduce glare for patients with albinism or significant photophobia?

Accepted Answer

Amber or yellow-brown tint

Answer

Amber/yellow-brown tints filter short wavelengths that scatter most in the eye, reducing glare and increasing contrast, which is particularly beneficial for photophobic patients such as those with albinism.

Question 3

A low vision patient is trained in 'scanning' using a handheld telescope. The direction of telescope movement to locate an object to the patient's right should be:

Accepted Answer

Move the telescope to the right, in the same direction as the target

Answer

An astronomical (inverting) telescope reverses image direction, but a Galilean (erect-image) telescope used for spotting moves in the same direction as the target; for clinical training, patients learn to move toward the target.

Question 4

Which of the following describes the role of the orientation and mobility (O&M) specialist in the low vision rehabilitation team?

Accepted Answer

Training patients to travel safely using cane techniques, dog guides, and environmental cues

Answer

O&M specialists train individuals with visual impairment to move safely and independently through environments using systematic techniques including long cane use, sighted guide, and environmental awareness.

Question 5

A patient with advanced glaucoma has a small central island of vision. Which reading aid configuration would best serve this patient's tubular visual field?

Accepted Answer

A reverse telescope to minify the image and fit more text in the remaining field

Answer

A reverse (minifying) telescope reduces image size, allowing more of the reading environment to fall within the patient's small central island — the opposite strategy from a magnifier.

ABO - American Board of Optometry Practice Test

ABO - American Board of Optometry Practice Test

ABO Low Vision & Rehabilitation 5