ROTATIONALLY STABILIZED CONTACT LENS WITH IMPROVED COMFORT AND METHOD OF OPTIMIZATION

摘要

The invention provides an improved rotationally stabilized contact lens design and method of designing such a lens which minimizes stabilization time of the lens while maximizing the lens on-eye comfort. The lens and the method of designing the lens utilizes and combines non-circularity and thickness differential aspects resulting in equivalent or minimized stabilization time, ease of insertion and manufacturability as well as maximum comfort that is improved over that of what either aspect can achieve independently.

主权项

1. A method that optimizes the stabilization of a contact lens on eye while maximizing comfort comprising the steps of:
defining a matrixed set of peripheral geometries having a noncircularity component and a thickness differential wherein the noncircularity component ranges from 95% to 60% from a true circle and the thickness differential ranges from 0.1 mm to 0.4 mm wherein the matrixed set includes a minimum of two noncircularity values and a minimum of two thickness differential values, calculating the time to stabilize for each item in the matrixed set for a given noncircularity component and a given thickness differential;creating a contour plot showing the time to stabilize for each item in the matrixed set;
assessing the contour plot and defining the preferred region based upon at least one of three variables wherein the variables include maximizing comfort, minimizing time to stabilize, and minimizing manufacturing difficulty; selecting the peripheral geometry with a noncircularity component and a thickness differential which produces a time to stabilize within the preferred region.