Original Paper

Impact of Nuclear Cataract Density on Postoperative Refractive Outcome: IOL Master versus Ultrasound
Tetsuo Ueda, Futoshi Taketani, Takeo Ota, Yoshiaki Hara

Department of Ophthalmology, Nara Medical University, Nara, Japan

Address of Corresponding Author

Ophthalmologica 2007;221:384-387 (DOI: 10.1159/000107497)

  Key Words

• IOL Master
• Ultrasound
• Cataract density
• Nuclear cataract
• Postoperative refractive outcome

  Abstract

Purpose: To evaluate the effect of cataract density on the postoperative refractive outcome. Methods: For 59 nuclear cataract eyes, the axial length was preoperatively measured by the IOL Master (Zeiss, Germany) and ultrasound (US; UD-6000, Tomey, Japan) and the cataract density by EAS-1000 (Nidek, Japan). The prediction error was used as evaluation of the accuracy of ocular biometry. Results: There were significant differences between IOL Master and US in the mean error (0.24 ± 0.63 vs. 0.69 ± 0.64 dpt, p < 0.001) and the mean absolute error (0.57 ± 0.36 vs. 0.79 ± 0.53 dpt, p < 0.001). The cataract density was significantly correlated with the prediction error with IOL Master (r = 0.24, p = 0.03) and US (r = 0.29, p = 0.01). Conclusions: Measurements with the IOL Master are slightly affected by the cataract density due to the refractive index change, but its accuracy is less affected than US.

Copyright © 2007 S. Karger AG, Basel

  Author Contacts

Tetsuo Ueda, MD
Department of Ophthalmology
Nara Medical University
840, Kashihara-shi, Nara 634-8522 (Japan)
Tel. +81 744 223 051, Fax +81 744 238 032, E-Mail tueda@naramed-u.ac.jp

  Article Information

Received: July 7, 2006
Accepted: December 16, 2006
Number of Print Pages : 4
Number of Figures : 2, Number of Tables : 0, Number of References : 15