Related Experiment Videos
Digital system measurement of decentration of Worst-Fechner iris claw myopia intraocular lens
V T Pérez-Torregrosa1, J L Menezo, M A Harto
1Department of Ophthalmology, La Fe University Hospital, Valencia, Spain.
Background:
Topography measures the centration in refractive and corneal refractive surgery, but until recently there was no effective method to measure decentration in intraocular lens (IOL) implantation.
Patients And Methods:
We measured the decentration of 22 phakic eyes, in 14 high myopic patients, based upon photographs of the anterior segment using a digital analysis system (IMAGEnet Topcon Corporation 1988, Tokyo, Japan). These eyes had undergone IOL implantation for the correction of myopia with Worst-Fechner iris claw lenses. Decentration was measured with respect to the centers of both the cornea and pupil.
Results:
Mean decentration of the IOL center from the cornea center was 0.51 +/- 0.25 mm (range, 0 to 0.8374 mm). When measured with respect to the center of the pupil, the average decentration was 0.47 +/- 0.29 mm (range, 0.182 to 0.9341 mm). A positive correlation between the decentration measurements of the two methods was found (p < .01 indicated statistical significance).
Conclusions:
This digital imaging system (IMAGEnet) accurately measured decentration of IOLs in myopic eyes.