Prism

Question 1

What does a prism do?

Answer 1

Deviates the light rays to a particular direction

Prevents double vision
Corrects strabismus

Question 2

Not direction of prism

Answer 2

Base in
Base out
Base up
Base down

Question 3

What is an induced prism

Answer 3

A prism caused by decentering

And causes unwanted effects

Question 4

Fresnel Prism definition

Answer 4

Peel and stick to lens

Question 5

Prentice’s Rule

Answer 5

The formula used to calculate the amount of prism

P=(h)(d)

Question 6

Define the prentice formula

Answer 6

P= prism power (D)

H= the distance between optical center of the lens and the position where the eye is looking through the lens (CM)

D= the power of the lens (D)