摘要 |
A system for facilitating contact lens design comprises an input unit for input of design parameters, and a processing unit for calculating a post-len s pressure profile based on the design parameters. The processing unit is arranged, in use, to perform a finite model calculation allowing for large deflection and non-linear geometry effects in the deformation of a model len s shape. Preferably the finite element model calculation utilises solid elemen ts of modelling the lens shape. A contact comprising a high Young~s modulus material such as silicone hydrogel can be designed to have a maximum corneal or limbal post-lens pressure valve of less than 250 Pa. |