Unit 2-Progressives Flashcards
0
Q
Where do you measure for a PAL?
A
Center of pupil
1
Q
What will effectively increase the intermediate and near viewing zones for PAL
A
Shorter vertex distances.
2
Q
How many degrees of panto is recommended for PAL patients?
A
10-12
3
Q
Progressive lenses with a GRADUAL increase in unwanted astigmatism is a _________ design.
A
Soft.
4
Q
The amount of prism used for prism thinning should equal ______ of the add power.
A
2/3
5
Q
When checking distance the lens should be…
A
Convex side up
6
Q
Wider distance?
A
Hard
7
Q
Narrow near?
A
Soft
8
Q
Wider near?
A
Hard.
9
Q
Rapidly increasing unwanted astigmatism?
A
Hard.
10
Q
More head movement but less swim?
A
Hard
11
Q
More head movement but less swim?
A
Soft
12
Q
Narrow distance?
A
Soft
13
Q
First PAL in the U.S.
A
1961 omnifocal
