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Published on: January 26, 2018
Impact of nuclear cataract density on postoperative refractive outcome: IOL Master versus ultrasound
Tetsuo Ueda1, Futoshi Taketani, Takeo Ota
1Department of Ophthalmology, Nara Medical University, Nara, Japan. tueda@naramed-u.ac.jp
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.
