CL

Question 1

If a lens is riding low what will raise the lens up?

Answer 1

Increase diameter
Minus carrier lenticular
Flatten peripheral curve

(If you increase the center thickness it will make it heavier and lower the lens more)

Question 2

RGP

If lens is too steep (central pooling )

Answer 2

Flatten lens. Add minus. Increase diameter

Question 3

RGP too flat (dark in center)

Answer 3

Steepen lens. Add minus. Increase diameter

Question 4

Lens rides low

Answer 4

Increase diameter

Thinner lens (if high Rx use lenticular or minus carrier lens)

Flatten peripheral curve: Increase edge lift so lens can interact with lid and raise up

BC- flatten

Question 5

Lens rides high

Answer 5

Decrease diameter

Steepen peripheral curve: Decrease peripheral edge lift

Question 6

Increasing lens diameter will cause lens to fit looser or tighter?

Answer 6

Tighter