Patent ID: 7270412
Filing Date: 2007-09-18
Classification: G02C

Abstract:
1. A method of fitting a contact lens, the contact lens having a central zone with a posterior surface having a curvature corresponding in a predetermined manner to the cornea of a wearer, at least one annular peripheral zone and an annular connecting zone, wherein the characteristics of the lens are selectively modifiable by varying at least one parameter selected from the group consisting of selectively changing the axial length of the connecting zone to produce directly corresponding changes in the sagittal depth of said contact lens, selectively changing the volume distribution of a void space formed beneath the connecting zone by selectively changing the diameter of the central zone, the axial length of the connecting zone and/or the radial width of the connecting zone without otherwise affecting the fit of the lens, selectively changing the radial location of possible peripheral tangential contact of said at least one peripheral zone to the peripheral cornea are provided by changing the angle made by the peripheral zone to the central axis of the lens, and selectively changing the edge lift of said contact lens from the cornea of a wearer are provided by changing the extension of the lens beyond the point of peripheral tangential contact of the lens with the cornea of a wearer or combinations thereof.