CPOT Contact Lens Fitting & Patient Care

Question 1

Which contact lens material has the highest oxygen transmissibility (Dk/t)?

Accepted Answer

Silicone hydrogel

Answer

PMMA (polymethylmethacrylate)

Answer

Conventional hydrogel

Answer

Low-water-content soft lens

Question 2

Which contact lens design is used to correct astigmatism?

Accepted Answer

Toric lens

Answer

Spherical soft lens

Answer

Multifocal lens

Answer

Monovision lens

Question 3

What does the measurement 'Dk/t' represent in contact lens specifications?

Accepted Answer

Oxygen transmissibility

Answer

Lens diameter-to-thickness ratio

Answer

Water content percentage

Answer

Base curve radius

Question 4

Which contact lens replacement schedule carries the lowest risk of deposit buildup?

Accepted Answer

Daily disposable

Answer

Annual replacement

Answer

Monthly replacement

Answer

Bi-weekly replacement

Question 5

What is the base curve of a contact lens?

Accepted Answer

The central posterior radius of curvature

Answer

The lens's refractive power in diopters

Answer

The overall lens diameter in millimeters

Answer

The water content of the lens material

Question 6

Rigid gas-permeable (RGP) contact lenses are considered the primary contact lens option for which condition?

Accepted Answer

Keratoconus with irregular corneal shape

Answer

Presbyopia in low-prescription patients

Answer

Mild myopia with low astigmatism

Answer

Dry eye syndrome with frequent lens dropout

Question 7

What is the primary clinical advantage of rigid gas-permeable (RGP) lenses over soft contact lenses?

Accepted Answer

Superior oxygen transmissibility and optical clarity

Answer

Greater initial comfort and immediate adaptation

Answer

Easier insertion and removal technique

Answer

Wider availability in tinted and colored options