ULTRASOUND BIOMICROSCOPY OF BAIKOFF ANTERIOR-CHAMBER PHAKIC INTRAOCULAR LENSES

BACKGROUND: The purpose of the study was to analyze qualitatively and quantitatively anatomic relationships of anterior chamber Baikoff phak ic intraocular lenses (IOL) to the cornea, angle, iris, and lens in my opic eyes. METHODS: Thirteen phakic myopic eyes (-9.00 to -15.00 diopt ers) corrected by minus power, angle-supported, anterior chamber intra ocular lenses of the ZB5M style (Chiron-Domilens), with a mean follow- up of 25 months (range 18 to 36 months), were examined clinically and by ultrasound biomicroscopy. RESULTS: The mean distance (+/-SD) betwee n the central cornea and the IOL was 2.05 +/- 0.18 mm (range 1.8 to 2. 47 mm); mean distance between the corneal periphery and the IOL was 1. 56 +/- 0.17 mm (range 1.33 to 1.95 mm); and the mean distance between the POL and the lens was 0.58 +/- 0.12 mm (range 0.48 to 0.81 mm). IOL footplates seemed to be correctly positioned in the angle in all eyes . We observed no goniosynechiae. In six eyes, we found localized poste rior indentation of the iris caused by the haptics. Four of these six eyes exhibited oval pupils associated with an oversized IOL. CONCLUSIO NS: High frequency ultrasound biomicroscopy can define anatomic relati onships of anterior chamber phakic IOLs, and help analyze the mechanis ms of corneal and iris complications.