An Analysis Of Posterior Surface Aspheric RGP's Using Computer-Assisted Videography.

Posterior surface aspheric rigid lenses are being used more and more to enhance fitting and to provide a multifocal option to presbyopic contact lens wearers. These lenses have very complex posterior geometries and therefore are difficult to anufacture and polish as well as verify. Computer lathes and new polishing techniques are making the lenses more reproducable and computer-assisted videography may be the next step in lens verification and quality control. This study is going to use the EyeSys Corneal Analysis System to analyze and present many different aspheric designs, calculate their eccentricities, and contrast and compare color map representations of each lens design.