CO CO Optical Instruments & Diagnostic Equipment 2

Question 1

The Bagolini striated lens test is used to evaluate which aspect of binocular vision?

Accepted Answer

Retinal correspondence and suppression

Answer

Bagolini striated lenses test retinal correspondence and suppression under near-natural viewing conditions by creating streak images from a point source.

Question 2

A keratometer (ophthalmometer) is used to measure which ocular parameter?

Accepted Answer

Corneal curvature/power

Answer

A keratometer measures the curvature of the anterior corneal surface, which is essential for contact lens fitting and detecting astigmatism.

Question 3

When performing retinoscopy, a 'with' motion of the reflex indicates which refractive state?

Accepted Answer

Hyperopia or myopia less than working distance

Answer

A 'with' motion in retinoscopy occurs when the patient's far point is beyond the examiner, indicating hyperopia or myopia less than the working distance correction.

Question 4

The Hess screen test and the Lee screen test both map the positions of gaze to identify which condition?

Accepted Answer

Extraocular muscle paresis or restriction

Answer

Hess and Lee screen tests plot ocular motility in all nine diagnostic positions of gaze to identify and localize paretic or restricted extraocular muscles.

Question 5

When calibrating a prism cover test measurement, what does the endpoint (neutralization point) indicate?

Accepted Answer

No refixation movement when cover is moved

Answer

Neutralization is reached when no refixation movement is observed as the cover is alternated, meaning the prism has fully corrected the measured deviation.

(CO) Certified Orthoptist Practice Test

(CO) Certified Orthoptist Practice Test

CO CO Optical Instruments & Diagnostic Equipment 2