Tomey AL-4000 User Manual

䕔 4-2
RF : Refractive factor
P>16 䊻RF = 1.25
P䍺16 䊻RF = 1
COR : Correction
L < 20.0 䊻COR = 3
20.0䍺L < 21.0 䊻COR = 2
21.0䍺L < 22.0 䊻COR = 1
22.0䍺L < 24.5 䊻COR = 0
24.5䍺L 䊻COR = -0.5
4.1.2 SRK/T formula
1. Implanted IOL power (D) for emmentropization
 
YCL
Xna
P
emme
11
1000



2. Implanted IOL power (D) for ametropia
  
    
rCYVREFYCL
rLXVREFXna
P
amet



1001.011
1001.01000
3. Estimated refractive power after surgery (D)
 
    
rCYVCLPrLXVna
CLYPXna
REF
iol



111001.01
111000
Where:
X = na䡡r – L1(nc - 1)
Y = na䡡r – C1(nc - 1)
L1 : Visual axial length (mm)
= L + 䠄0.65696-0.02029L䠅
L : Axial length (mm)
REF : Desired refractive power after surgery (D)
r : Radius of corneal curvature (mm)
= 337.5/K
W : Calculated corneal diameter (mm)
= -5.41 + 0.58412LC + 0.098K

Tomey AL-4000 Specifications

General

Brand	Tomey
Model	AL-4000
Category	Measuring Instruments
Language	English