Patent ID: 8409181
Filing Date: 2013-04-02
Classification: A61F

Abstract:
1. A method of treating presbyopia of an eye, the method comprising: determining a presbyopia-correcting refractive power for the eye by determining an ametropic-correcting prescription for the eye; and ablating a stroma of a cornea of the eye to form a final ablated shape in the stroma, the final ablated shape including a central zone defined by a concavity having a central zone depth (d), a central zone diameter (D), and a radius of curvature (R) in a range of about 3 mm to about 20 mm, the central zone depth and the central zone diameter each selected to provide a near-vision add power between 1.0 Diopters and 3.5 Diopters after the epithelium is regenerated over the stroma; wherein D=Φ√{square root over (%)}, where % is an optimal percentage of light passing through a near vision zone of the cornea and (1) is an average photopic pupil diameter of a patient who is 45 years or older, the optimal percentage being between about 20% and about 60% and R=Δn÷ΔP where ΔP is a desired near vision add power and Δn is a difference in refractive index between the epithelium and the stroma.