Stereoacuity after refractive lens exchange with AcrySof ReSTOR intraocular lens implantation.

PURPOSE: To evaluate stereoacuity before and after refractive lens exchange (RLE) with AcrySof ReSTOR intraocular lens (IOL) implantation.

METHODS

Stereoacuity was measured using the Titmus stereotest at 40 cm under photopic conditions (85 cd/m(2)) before and after RLE with bilateral AcrySof ReSTOR Natural (SN60D3 model) implantation in 30 hyperopic eyes of presbyopes with low astigmatism (< or =1.00 diopter [D]). Stereoacuity measurements after implantation were compared with those found before surgery.

RESULTS

Stereoacuity was unchanged after RLE with pseudoaccommodative IOL implantation. In this population of non-cataractous hyperopes with excellent preoperative stereoacuity (46.42+/-1.36 sec arc), 95% maintained the same level of stereoacuity (48.67+/-1.13 sec arc) after surgery (P=.223). Further calculations predict that this ability to discriminate objects in depth extends to approximately 2 m. Beyond this distance, depth discrimination does not help the visual system.

CONCLUSIONS

Refractive lens exchange with AcrySof ReSTOR IOL implantation does not affect the binocular ability of the human eye regarding depth perception, the best evidence of binocular function in hyperopic individuals.