Page 2 - Materi RayOne Toric
P. 2
Cara menghitung Power Lensa :
K1 axis of
cornea
Cil= K 1-K 2
Cil= 43.66 D- 46.68 D
Cil= -3.02 D
Sphere Power
+20.0 D
Overall power of the
op c (Sphere
Equivalent)
P = A1 - 2.5L - 0.9K2 = 21.0 D
- 2.5(22.76) - 0.9(46.68)
P = 118.6
P = 118.6 – 56.9 – 42.01
P = 19.69 D
SE = Sphere + (0.5 x cylinder)
= 19.69 + (0.5 x 3.02)
= 21.2 D
