Test 2 Review

Question 1

What happens to the fit of a GP lens is you decrease the BCR?

Answer 1

Makes it more loose

Question 2

In both mm and D, how do you tighten a lens by manipulating the OAD?

Answer 2

mm - decrease

D - increase

Question 3

If you increase the OAD of a GP lens, what happens to the fit?

Answer 3

Makes it tighter

Question 4

If you decrease the OAD of a GP lens, what happens to the fit?

Answer 4

Makes it flatter

Question 5

When is a Back Surface Toric GP lens required?

Answer 5

When Rx Cyl = 1.5 x delta K

Question 6

Does rotation of a bitoric SPE lens cause a decrease in VA?

Answer 6

No

Question 7

Does rotation of a bitoric CPE lens cause a decrease in VA?

Answer 7

Yes

Question 8

Bitoric SPE lenses are similar to what?

Answer 8

Front surface toric lenses

Question 9

What does the front surface of a bitoric SPE lens carry?

Answer 9

Cyl opposed to the induced astigmatism

Question 10

What does the front surface of a bitoric CPE lens carry?

Answer 10

Cyl that corrects induced astigmatism AND internal astigmatism