Tomey AL-100 User Manual

4-9
4.1.6 Hoffer Q
a. Emmetropic IOL power (D)
P =
1336
-
1.336
L - C - 0.05 1.336
-
C + 0.05
K + R 1000
Where:
R =
Rx
1 - 0.012 Rx
b. Desired postoperative refraction by spectacle (D)
Rx =
Ri
1 - 0.012 Ri
Where:
R =
1.336
1.336
+
C + 0.05
1336
- P
1000
L - C - 0.05
C = X + Y
X = C1 + 0.3 x(L-23.5) + (tan K)
2
Y = 0.1M x(23.5 - L)
2
x tan {0.1 (G - L)
2
} - 0.99166
L  23.0 → M = +1, G = 28.0
L >23.0 → M = -1, G = 23.5
L >31.0 → L = 31
L <18.5 → L = 18.5
P: Power of IOL implant (D)
L: Axial length (mm)
C1: Personalized anterior chamber depth (mm)
K: Average refractive power (D) = (K1 + K2) / 2
Rx: Desired postoperative refraction by spectacle
(D)

Tomey AL-100 Specifications

General

Brand	Tomey
Model	AL-100
Category	Measuring Instruments
Language	English