JCAHPO Corrective Lenses

Question 1

What is the primary purpose of corrective lenses?

Accepted Answer

To correct refractive vision errors and improve clarity.

Answer

To enhance the aesthetic appearance of the eyes.

Answer

To protect the eyes from UV radiation.

Answer

To relieve eye strain caused by prolonged screen use.

Question 2

What are the common types of refractive errors corrected by lenses?

Accepted Answer

Myopia, hyperopia, and astigmatism.

Answer

Only myopia.

Answer

Only hyperopia.

Answer

Only astigmatism.

Question 3

How do bifocal lenses work?

Accepted Answer

They provide two different prescriptions in one lens for both near and far vision.

Answer

They are designed for people with astigmatism.

Answer

They correct nearsightedness only.

Answer

They provide a single prescription for distance vision.

Question 4

What is the difference between single vision and progressive lenses?

Accepted Answer

Single vision lenses provide a single prescription, while progressive lenses provide multiple prescriptions without lines.

Answer

Single vision lenses are for older adults, while progressive lenses are for children.

Answer

Progressive lenses are for nearsightedness, while single vision lenses are for farsightedness.

Answer

Single vision lenses are more expensive than progressive lenses.

Question 5

What is the benefit of using photochromic lenses?

Accepted Answer

They adapt to light conditions, darkening in bright light and clearing up indoors.

Answer

They reduce glare from electronic devices.

Answer

They improve the contrast in low-light conditions.

Answer

They provide protection against blue light.

Question 6

Why are contact lenses preferred by some patients over glasses?

Accepted Answer

They provide better aesthetics and comfort for some patients.

Answer

They are more affordable than glasses.

Answer

They offer more protection from sunlight.

Answer

They are easier to clean than glasses.

Question 7

What is astigmatism, and how is it corrected by lenses?

Accepted Answer

Astigmatism is corrected by toric lenses that compensate for uneven corneal curvature.

Answer

Astigmatism is corrected by single vision lenses.

Answer

Astigmatism cannot be corrected by lenses.

Answer

Astigmatism is corrected by bifocal lenses.

Question 8

What is the function of UV protection in lenses?

Accepted Answer

To protect the eyes from harmful UV rays and reduce the risk of eye diseases.

Answer

To prevent glare from screens.

Answer

To improve contrast in low light.

Answer

To enhance the color of the lens.

Question 9

What is the main reason for using polarized lenses?

Accepted Answer

To reduce glare from reflective surfaces, improving visual clarity.

Answer

To reduce the amount of light entering the eyes.

Answer

To enhance the color perception.

Answer

To provide better UV protection.