J Korean Ophthalmol Soc.  2013 May;54(5):723-727. 10.3341/jkos.2013.54.5.723.

Comparison of the Refractive Results Measured by Ultrasound and Partial Coherence Interferometers

• Shin JA
• Chung SK

• KMID: 2217037
• DOI: http://doi.org/10.3341/jkos.2013.54.5.723

Abstract

PURPOSE
To compare ocular biometry measured by applanation ultrasonography and IOL Master(R), 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(R). 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(R) (p = 0.501). When using ultrasonography, the mean absolute error (MAE) of the ultrasonography and IOL Master(R) 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(R) was longer and ACD measured by IOL Master(R) 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.

Keyword

A-scan; Axial length; IOL Master(R); Partial coherence interferometer; Refractive error

MeSH Terms

Anterior Chamber
Biometry
Cataract
Eye
Humans
Refractive Errors

Reference

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