CO Optical Instruments & Diagnostic Equipment Flashcards
6 cards from real CO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CO Optical Instruments & Diagnostic Equipment flashcards as text
Which instrument is primarily used to measure the angle of deviation in strabismus by projecting a light onto each cornea?
Answer: Krimsky test
The Krimsky test uses a prism placed before one eye while observing corneal light reflexes to measure the angle of strabismic deviation.
A synoptophore (amblyoscope) is BEST used to assess which of the following?
Answer: Binocular vision and fusion
The synoptophore is a major amblyoscope used to assess, measure, and treat binocular vision disorders including fusion and stereopsis.
The Worth 4-dot test uses which colors to assess binocular fusion?
Answer: Red, green, and white
The Worth 4-dot test uses two green dots, one red dot, and one white dot, viewed through red-green glasses to assess binocular fusion.
When using a prism bar to measure a horizontal deviation, the prism base direction should be oriented in which direction to neutralize an esotropia?
Answer: Base-out
Base-out prisms neutralize esotropia by shifting the image toward the deviated eye, allowing the cover-uncover test to show neutralization.
The Maddox rod test is primarily used to measure which type of deviation?
Answer: Phorias and small tropias
The Maddox rod dissociates the eyes and measures the full extent of a phoria or small tropia by converting a point of light into a streak.
Which instrument measures stereoacuity using random dot patterns without monocular cues?
Answer: TNO test
The TNO test uses random-dot anaglyphic plates that eliminate all monocular cues, making it a true test of stereoscopic depth perception.