Formulas Flashcards
0
Q
Power of a lens
A
P=f+b
1
Q
Focal length formula
A
D=1/f
2
Q
Patients actual rx?
A
Sphere power and what is read on lensometer for the cyl.
3
Q
Prentice rule?
A
P=hxd/10
H= length in mm D= diopter power P= prism