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Impressum
Comparison of acoustical and optical biometry for IOL calculation in cataract procedures
Liedtke S., Dreiss A. K., Wellermann G., Kohnen T.
Zentrum der Augenheilkunde, Johann Wolfgang Goethe Universität, Theodor-Stern-Kai 7, D-60590 Frankfurt am Main
Objective: Aim of the study was to compare acoustical and optical
biometry for IOL calculation.
Methods: So far we included 30 phacoemulsification cases performed
by one surgeon and the data (axial length / radius of corneal curvature)
for the calculation formula (Holladay II) were assessed in the following
way:
(1) acoustic axial length measurement with automatic keratometry
(2) acoustic axial length measurement with manual keratometry
(3) optic axial length measurement with automaticl keratometry
(4) optic axial length measurement with manual keratometry.
The spherical equivalent (SE) of postoperative refraction was compared
with the predicted refraction (appr. -0,5 diopter).
Results: The difference of real and predicted refraction (SE) was
0.06 (±0.90) in the first group, 0.06 (±0.73) in the second
group, 0.02 (±0.94) for the third group and 0.13 (±0.57)
for group four.
Conclusion: By now there is no difference detectable for acoustical
and optical biometry.