Unit 4

Question 0

A patient has previously been unable to wear contacts lenses due to cornea hypoxia and excessive lens deposits. Which lens materials would be used to alleviate these problems?

Answer 0

FSA

Question 1

The DK value of a lens represents it’s…

Answer 1

Permeability

Question 2

In cases of high corneal astigmatism what type of rigid lens would result in the best fit?

Answer 2

Bitoric.

Question 3

Given the following conditions what type of lens will best fit the patients needs?

-1.50sph. Patient wants lenses for tennis, basketball, and evening wear only.

What material would be best?

Answer 3

HEMA

Question 4

What material would be best for intermittent wear?

Answer 4

HEMA

Question 5

The first SOFT contact lenses were made using the _____ method.

Answer 5

Spin cast

Question 6

What material would represent a soft lens?

Answer 6

Hydroxyethylmethacrylate

Question 7

Spherical Rigid lenses

Answer 7

CRA <3.00D

Question 8

Front surface toric

Answer 8

CRA >1.00D, difference in Ks <3.00D

Question 9

Back surface or bitoric

Answer 9

Difference in Ks 3.00D or >