Related Experiment Videos
[Comparison between optical and acoustical biometry].
C P A Gantenbein1, K W Ruprecht
1Département d'Ophtalmologie, Hôpitaux Universitaires de la Sarre, Kirrbergstrasse 1, 66421 Hambourg/Saar, Allemagne. aucgan@med.rz.unii-sb.de
Journal Francais D'Ophtalmologie
|February 3, 2005
Summary
The IOL-Master and standard biometry showed good correlation, but the standard method yielded more accurate postoperative refraction. Adjusting the IOL-Master
Area of Science:
- Ophthalmology
- Biomedical Engineering
Background:
- Current standard biometric measurements were compared against IOL-Master measurements.
- 162 cataractous eyes were analyzed.
Purpose of the Study:
- To compare the accuracy of IOL-Master measurements with standard biometry for intraocular lens power calculation.
- To evaluate the predictability of postoperative refraction using both methods.
Main Methods:
- Eyes were measured using IOL-Master and acoustic biometry with Javal-Keratometry.
- Intraocular lens power was calculated using the SRK/T formula based on standard method measurements.
- Postoperative refractions were collected and statistically analyzed.
Main Results:
- Good correlation was found between IOL-Master and standard biometry for axial length and keratometry.
- Acoustic biometry yielded significantly shorter axial lengths (p < 0.001).
- Javal-Keratometry showed significantly higher mean corneal power (p < 0.001).
- The standard method provided better accuracy in achieving target postoperative refraction compared to IOL-Master.
Conclusions:
- Systemic differences in measurement results were confirmed.
- IOL-Master offers time savings and allows for delegated measurements.
- Adapting the "A" constant for the IOL-Master is recommended to enhance refractive predictability.