AOC AOC Visual Optics and Refraction Concepts 2

Question 1

Presbyopia is caused by which age-related change?

Accepted Answer

Decreased elasticity of the crystalline lens

Answer

Presbyopia results from the gradual hardening and loss of elasticity of the crystalline lens, reducing the eye's ability to accommodate for near vision.

Question 2

Which term describes the ability of the eye to change focus from distance to near objects?

Accepted Answer

Accommodation

Answer

Accommodation is the dynamic change in the optical power of the crystalline lens to maintain a clear image at varying distances.

Question 3

In retinoscopy, when the streak reflex moves in the same direction as the retinoscope streak, this is called:

Accepted Answer

With motion

Answer

With-motion in retinoscopy indicates that the eye is beyond the working distance or has hyperopia, meaning plus lenses are needed to neutralize.

Question 4

The lensometer (vertometer/lensmeter) is used to measure:

Accepted Answer

The power of a spectacle or contact lens

Answer

The lensometer measures the sphere, cylinder, axis, and prism content of an existing spectacle or contact lens.

Question 5

A prism diopter is defined as a deflection of light by how many centimeters at 1 meter?

Accepted Answer

1 cm

Answer

One prism diopter deflects a ray of light 1 centimeter at a distance of 1 meter from the prism.

(AOC) American Orthoptic Council Practice Test

(AOC) American Orthoptic Council Practice Test

AOC AOC Visual Optics and Refraction Concepts 2