UNIT ONE - Intro To Multifocals Flashcards
1
Q
What are the two types of multifocal segments?
A
One piece and fused
2
Q
What is the indent in a fused multifocal called?
A
Counter sink 
3
Q
What is the piece that is fused into the opening of a fused multifocal called?
A
The button
4
Q
What material is used for a fused multifocal ?
A
Glass only
5
Q
What is the formula used to calculate the true reading power? (TRP)
A
Add power + sphere
Keep the cyl and axis
6
Q
What is the formula used to calculate intermediate power?
A
1/2 add power + sphere
Keep cyl and axis
