METHODS FOR DESIGNING AND MAKING CONTACT LENSES HAVING ABERRATION CONTROL AND CONTACT LENSES MADE THEREBY

摘要

A method for constructing a soft contact lens (20) having a prescribed power correction for focusing light on the retina (35) of an eye is described. The method provides a soft contact lens (20) that, when in place on the wearer's eye, is designed and manufactured to provide a substantially ellipsoidal anterior surface. In the method, an eye model (10) including a cornea, a crystalline lens and a retina is constructed. An analysis is performed using the preliminary soft contact lens (20) and eye model tracing light ray paths through the contact lens/eye system. The shape factor of the anterior contact lens surface (36) when applied to the anterior surface of the cornea (30) is varied to achieve a contact lens/eye system where a trace of light ray paths is optimized for sharpest focust by minimizing a retinal spot size of the rays.