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Abstract #9157 Published in IGR 5-2
First steps with the Zeiss IOLMaster®: a comparison between acoustic contact biometry and non-contact optical biometry
Gantenbein C; Lang HM; Ruprecht KW; Georg TKlinische Monatsblätter für Augenheilkunde 2003; 309-314
BACKGROUND: After having received an IOL-Master (Zeiss, Jena), the authors compared their actual standard method with this new device. PATIENTS, MATERIAL AND METHODS: From March to June 2002, they examined 175 consecutive cataractous eyes with the IOL-Master as well as with the acoustic biometry (Tomey AL-1000) combined to the Javal-Keratometer (Haag-Streit, Bern). The results were compared and analyzed statistically. In all eyes, the intraocular lens to be implanted was chosen by means of the SRK/T formula, based on the measurements conducted with the authors' standard method. The achieved postoperative refraction of 153 eyes obtained, at least six weeks after surgery, by the treating ophthalmologists, was communicated to them. RESULTS: Comparison of eye lengths as well as of keratometric measurements showed good correspondence between the measurements obtained by both methods, acoustic biometry yielding significantly (p < 0.001) shorter axial lengths than the IOL-Master, and the Javal yielding significantly (p < 0.001) higher mean corneal refraction power than the IOL-Master. For both measurements, regression lines showed good coherence of the results over the refraction sample of these patients. Surprisingly, the accuracy of the refraction obtained postoperatively compared to the preoperative aim was better with the authors' standard method compared to the IOL-Master. CONCLUSIONS: The predicted systemic differences in measurement results could be verified. No improvement in the accuracy of postoperative refraction prediction has been achieved so far. The current advantage of the IOL-Master in the authors' clinic is the substantial gain in time, as well as the fact that performance of the measurements may be delegated. LA: German
Dr. C. Gantenbein, Universitäts-Augenklinik Homburg/Saar, Germany
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
