AOC AOC Diagnostic Testing and Instrumentation 1

Question 1

Which instrument is used in orthoptics to measure and treat strabismus by presenting different images to each eye simultaneously?

Accepted Answer

Synoptophore (major amblyoscope)

Answer

The synoptophore (major amblyoscope) projects separate targets to each eye, allowing measurement of strabismus angles and assessment of binocular vision.

Question 2

When performing visual acuity testing in young children unable to read letters, which test is most commonly used?

Accepted Answer

Lea symbols or Teller acuity cards

Answer

Lea symbols and Teller acuity cards are developmentally appropriate tools for assessing visual acuity in preverbal or young children.

Question 3

Which test uses a red glass placed before one eye to evaluate ocular alignment and measure diplopia?

Accepted Answer

Red glass test (Lancaster or Hess screen)

Answer

The red glass test dissociates the two eyes using a red filter and a light source to map diplopia fields and estimate deviation.

Question 4

The Maddox rod test is used primarily to measure which type of deviation?

Accepted Answer

Horizontal and vertical phorias

Answer

The Maddox rod converts a point light source into a streak, dissociating the eyes to reveal and measure horizontal and vertical phorias.

Question 5

Visual field testing is performed in the orthoptic setting most commonly using which method to map peripheral function?

Accepted Answer

Confrontation field testing or automated perimetry

Answer

Confrontation field testing and automated perimetry (e.g., Humphrey) are standard methods to map the peripheral and central visual fields.

(AOC) American Orthoptic Council Practice Test

(AOC) American Orthoptic Council Practice Test

AOC AOC Diagnostic Testing and Instrumentation 1