Carrera SJC, Barojas WE

Language: Spanish
References: 10
Page: 360-365
PDF size: 124.49 Kb.

ABSTRACT

The aim of this study is to compare the IOL Master Optical biometry with the immersion ultrasound acoustical biometry. We performed acoustical and optical biometry in 87 eyes (67 patients) with average age of 65.25 years (range 21 to 90), 37 females, 30 males. We were able to perform acoustical biometry in 100% of eyes and optical biometry in 71.3% (62 eyes), the optical biometry failed in 28.7% of cases (25 eyes). Keratometric performance was similar with the autorefractor in 88.7% of cases. We founded the composite signal superior to a Signal to Noise Ratio (SNR) of 2.5 to be very consistent with acoustic ultrasound. In those cases with SNR ‹ 2.5 the acoustical biometry is preferable. Most of those cases where the optical biometry failed had posterior subcapsular opacities P4 and P5 or white cataract. Some P3 associated with cortical opacities, also failed to the optical biometry. Most of the P3 without, Cortical and nuclear cataracts got the optical biometry. The Intraocular lens power calculated with SRK-T and Haigis formula was similar in 77.4% of eyes.

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