COT Visual Field Testing 2

Question 1

Which visual field test strategy presents stimuli at threshold levels determined by prior responses, making it more efficient than full threshold testing?

Accepted Answer

SITA Standard

Answer

SITA (Swedish Interactive Thresholding Algorithm) Standard uses statistical modeling to estimate thresholds faster than traditional full threshold strategies.

Question 2

A patient shows a visual field defect that respects the horizontal midline and corresponds to the inferior retina. This pattern is most consistent with:

Accepted Answer

Altitudinal defect from anterior ischemic optic neuropathy

Answer

Altitudinal defects that respect the horizontal meridian are classic for anterior ischemic optic neuropathy (AION), affecting the superior or inferior half of the field.

Question 3

On a Humphrey Visual Field printout, what does the Pattern Deviation plot show?

Accepted Answer

Sensitivity values corrected for generalized depression

Answer

The Pattern Deviation plot removes overall sensitivity depression (e.g., from cataract), revealing localized defects more clearly.

Question 4

Which stimulus size is the standard default for automated static perimetry on the Humphrey Field Analyzer?

Accepted Answer

Goldmann III

Answer

Goldmann Size III (0.43° diameter) is the standard stimulus used for automated threshold perimetry on the Humphrey Field Analyzer.

Question 5

A patient's visual field shows a defect in the right eye's temporal field and left eye's temporal field simultaneously. This bilateral temporal loss suggests a lesion at the:

Accepted Answer

Optic chiasm

Answer

Bitemporal hemianopia results from compression of the optic chiasm where nasal fibers from both eyes cross, typically caused by a pituitary tumor.

COT - Certified Ophthalmic Technician Practice Test

COT - Certified Ophthalmic Technician Practice Test

COT Visual Field Testing 2