CONTACT LENSES AND METHODS OF DESIGNING SAID CONTACT LENSES Russian patent published in 2012 - IPC G02C7/04 

FIELD: physics.

SUBSTANCE: design of contact lenses can be optimised virtually, thus eliminating the need for iterative design-test on-eye and re-design cycles. Method for designing a contact lens comprises the steps of selecting an eye model; selecting optical performance metrics for vision correction with a lens on-eye using the model eye; providing a first lens having a first design, the design comprising at least a first optical zone; simulating the flexure of the first lens on-eye in order to determine a shape and performance measurements for the first lens on-eye; comparing the performance metrics with the performance measurements; selecting the first design as the contact lens design if it meets the performance metrics and correcting the first design to better meet such performance metrics if it does not; wherein the model represents lenses as nodes and elements of a finite element mesh such that a load or a series of loads, simulating forces in vivo, are applied to the lens while it is on-eye.

EFFECT: design of contact lenses, where their flexure is taken into account in order to improve comfort and simplify use of contact lenses which do not have complex design of the back surface.

12 cl, 4 dwg