calculation?? Flashcards
1
Q
formula to find near distance
A
Distance + addition
2
Q
formula to find addition
A
Near - Distance
3
Q
formula to find distance
A
near - addition
4
Q
occupational glasses
A
indoor distance whatsoever 0_0
5
Q
impact resistance plastic lenses
A
trivex, polycarbonate
6
Q
highest plastic lens index
A
1.74
7
Q
highest glass lens index
A
1.9
8
Q
index for polycarbonate lens
A
1.59/1.6
9
Q
transposition
A
if plus change to minus, then minus sphere and the cylinder. do the opposite if need to change minus to plus. (dont be stupid)
