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KMID : 0360220130540050723
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Journal of the Korean Ophthalmological Society
2013 Volume.54 No. 5 p.723 ~ p.727
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Comparison of the Refractive Results Measured by Ultrasound and Partial Coherence Interferometers
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Shin Jeing-Ah
Chung Sung-Kun
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Abstract
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Purpose: To compare ocular biometry measured by applanation ultrasonography and IOL Master®, and evaluate the accuracies of the refractive outcome after cataract surgery. Methods: The biometries of 76 cataractous eyes were measured using ultrasonography and IOL Master®. The SRK-T formula was employed to predict the patient’s implanted IOL power. Two months after cataract surgery, the refractive outcome was determined, and results from the 2 different biometry methods were compared. Results: There were no statistically significant differences in axial length (AXL) and anterior chamber depth (ACD) between ultrasonography and IOL Master® (p = 0.501). When using ultrasonography, the mean absolute error (MAE) of the ultrasonography and IOL Master® was 0.53 ± 0.30 diopter (D), 0.55 ± 0.41 D, respectively. The difference between the 2 biometry methods was not statistically significant (p = 0.110). Conclusions: Although the difference was not statistically significant, AXL measured by IOL Master® was longer and ACD measured by IOL Master® was deeper than when measured by A-scan. This difference was more pronounced in patients with a short AXL. The accuracy of IOL power calculation was similar between the 2 devices.
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KEYWORD
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A-scan, Axial length, IOL Master®, Partial coherence interferometer, Refractive error
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