Patent ID: 7237894

Claim:
A method for correcting presbyopia, comprising the steps of: reshaping the central vision area of the cornea of an eye to produce an optical zone, which includes a vertical meridian, a horizontal meridian, a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone, wherein the distance vision zone is located in the upper portion of the central vision area and provides a distance power for distance vision correction; wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central vision area and includes a variable intermediate vision correction zone and a near vision correction zone; wherein the rotationally-asymmetrical progressive zone has an upper boundary, a lower boundary, a radial center located in the vertical meridian of the central vision area and below the center of the central vision area; and wherein the rotationally-asymmetrical progressive zone further has a surface that provides a power profile that increases, along the vertical meridian in the variable intermediate vision correction zone, from the distance power at the upper boundary to a near power at the radial center, and then remains substantially constant in the near vision correction zone from the radial center to a point near the lower boundary along the vertical meridian.