Contrast sensitivity after refractive lens exchange with diffractive multifocal intraocular lens implantation in hyperopic eyes.

摘要

PURPOSE: To evaluate distance and near contrast sensitivity under photopic and mesopic conditions before and after refractive lens exchange (RLE) with implantation of a diffractive multifocal intraocular lens (IOL). SETTING: University of Valencia, Valencia, Spain. METHODS: Monocular contrast sensitivity function was measured with the Functional Acuity Contrast Test chart at distance and near under 3 luminance levels (85.0 cd/m(2), 5.0 cd/m(2), and 2.5 cd/m(2)) before and after RLE with bilateral AcrySof ReSTOR IOL implantation in 30 hyperopic eyes with presbyopia and low astigmatism (.1, t test). CONCLUSIONS: Refractive lens exchange with implantation of a diffractive multifocal IOL gave good distance and near contrast sensitivity under photopic and mesopic conditions. Although mesopic contrast sensitivity was reduced at distance and near compared to that under photopic conditions, the performance was comparable to that with the natural lens preoperatively.