Contact Lenses

Question 1

What is a contraindication to contact lens wear?

A. Seizure disorders
B. Strabismus as a child
C. High blood pressure
D. Cataracts

Answer 1

A. Seizure disorders

Question 2

Changing the base curve of a contact lens changes the fitting charcteristics of that lens due to a change in sagittal depth. Increasing the base curve radius of a contact lens while maintaining the same diameter will cause the lens to fit

A. steeper and tighter
B. flatter and looser
C. higher and tighter
D. lower and looser

Answer 2

B. flatter and looser

Question 3

Extended wear contact lenses are made of materials that allow greater permeability of

A. water
B. oxygen
C. carbon dioxide
D. proteins

Answer 3

B. oxygen

Question 4

Daily wear contact lenses shoudl be removed each night or patients are at a greater risk of developing what condition?

A. detached retina
B. shallow anterior chamber
C. corneal edema
D. giant papillary conjunctivitis

Answer 4

C. corneal edema

Question 5

Spectacle blur is unclear vision associated with

A. changing from an old spectacle prescription to a new one
B. changing from contacts to spectacles
C. changing from spectacles to contacts
D. spasm of accommodation

Answer 5

B. changing from contacts to spectacles