Tomey AL-100 User Manual

4-1
4 TECHNICAL REFERENCE
4.1 IOL calculation formulae
4.1.1 SRK II
a. Emmetropic IOL power (D)
P
emme = A1 - 0.9K - 2.5L
b. Ametropic IOL power (D)
P
ament = Pemme - REF x CR
c. Desired postoperative refraction (D)
REF
iol = (Pemme - P) / CR
Where:
if L < 20.0, then A1 = A + 3
if 20.0  L < 21.0, then A1 = A + 2
if 21.0  L < 22.0, then A1 = A + 1
if 22.0  L < 24.5, then A1 = A
if L  24.5, then A1 = A - 0.5
if Pemme  14, then CR = 1.00
if Pemme > 14, then CR = 1.25
A: A - constant
K: Corneal refraction (D) = (K1 + K2) /2
L: Axial length (mm)
P: Power of IOL implant (D)
REF: Postoperative refractive power

Tomey AL-100 Specifications

General

Brand	Tomey
Model	AL-100
Category	Measuring Instruments
Language	English