1
Q
When does image jump occur?
A
When the eye crosses the segment line
2
Q
The amount of image jump depends on what two things?
A
Power of add and location of near OC 
3
Q
What formula is used to calculate image jump?
A
Prentices rule
4
Q
What is prentices rule formula?
A
Prism = Dd/10
5
Q
What do each of the items in prentices rule represent?
Prism=Dd/10
A
Prism: image jump
D: add power
d: near of location in mm
10: constant in formula
OPT 1156 ( FULL OVERVIEW )
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