CO CO Optical Instruments & Diagnostic Equipment

Question 1

Which instrument is primarily used to measure the angle of deviation in strabismus by projecting a light onto each cornea?

Accepted Answer

Krimsky test

Answer

Hirschberg light reflex test

Answer

Prism cover test

Answer

Worth 4-dot test

Question 2

A synoptophore (amblyoscope) is BEST used to assess which of the following?

Accepted Answer

Binocular vision and fusion

Answer

Intraocular pressure

Answer

Corneal curvature

Answer

Retinal thickness

Question 3

The Worth 4-dot test uses which colors to assess binocular fusion?

Accepted Answer

Red, green, and white

Answer

Red, green, blue, white

Answer

Blue, yellow, and red

Answer

Green, white, and yellow

Question 4

When using a prism bar to measure a horizontal deviation, the prism base direction should be oriented in which direction to neutralize an esotropia?

Accepted Answer

Base-out

Answer

Base-up

Answer

Base-down

Answer

Base-in

Question 5

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

Accepted Answer

Phorias and small tropias

Answer

Tropias only

Answer

Cyclodeviations

Answer

Vertical deviations only

Question 6

Which instrument measures stereoacuity using random dot patterns without monocular cues?

Accepted Answer

TNO test

Answer

Titmus fly test

Answer

Lang stereotest

Answer

Frisby test