17 Calculated correction of tonometrically mea
s
ured IOP
Instruction Manual Myopia Master® (G/68100/EN Rev04 0820)
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The diagram below shows the progression of the correction summand
over a range of corneal thickness as given by the three formula:
Fig. 17-1: Progression-diagram
Each formula gives a different way of calculating the IOP correction
summand, as follows:
Ehlers: IOP change = 0.071 * (545 µm - corneal thickness
measured
)
Shah: IOP change = 0.050 * (550 µm - corneal thickness
measured
)
Dresden: IOP change = 0.040 * (550 µm - corneal thickness
measured
)
17.2 Po
s
t-LASIK IOP correction
The Kohlhaas-formula estimates the true IOP concerning post-LASIK,
myopic patients.
