Refractive lens exchange (RLE) with implantation of AcrySof ReSTOR multifocal intraocular lenses (Alcon, Inc.) produces good depth perception in patients with normal binocular vision prior to surgery, according to a new European study.
Researchers in Spain and Portugal evaluated the stereoacuity of 15 farsighted subjects who elected to undergo RLE in both eyes for the correction of farsightedness and presbyopia. None of the participants in the study had cataracts prior to surgery.
Stereoacuity, a sensitive measure of a person’s 3-dimensional vision and ability to perceive depth, was measured with a standard clinical test (Titmus stereotest) before and after RLE surgery.
All participants in the study had excellent stereoacuity scores prior to surgery. After bilateral RLE surgery, 95 percent of patients receiving AcrySof ReSTOR multifocal IOLs in both eyes maintained the same level of stereoacuity they had prior to surgery.
The authors of the study concluded that refractive lens exchange with bilateral AcrySof ReSTOR multifocal IOLs does not affect the depth perception of farsighted patients with normal binocular vision prior to surgery.
SOURCE: Stereoacuity after refractive lens exchange with AcrySof ReSTOR intraocular lens implantation. Journal of Refractive Surgery. November, 2009.
Tags: depth perception, stereoacuity