Mask for increasing depth of focus

Abstract

A mask configured to be implanted in a cornea of a patient to increase the depth of focus of the patient includes an anterior surface, a posterior surface, and a plurality of holes. The anterior surface is configured to reside adjacent a first corneal layer. The posterior surface is configured to reside adjacent a second corneal layer. The plurality of holes extends at least partially between the anterior surface and the posterior surface. The holes of the plurality of holes are configured to substantially eliminate visible diffraction patterns.

What is claimed is: 
     
         1 . An ophthalmic device, comprising:
 an intraocular lens configured to be implanted posterior of the cornea; and   a mask coupled with the intraocular lens, the mask configured to increase the depth of focus of the patient, the mask comprising an aperture configured to transmit along an optical axis substantially all incident light and a substantially opaque portion surrounding at least a portion of the aperture;   a plurality of irregularly located nutrient flow paths in the opaque portion, the irregularly located nutrient flow paths configured to permit nutrient flow between posterior and anterior portions of the mask.