Patent ID: 7860594

Claim:
A method for producing a contact lens for a specific patient, comprising the steps of: receiving a prescription comprising a set of characteristic data of an eye of said specific patient; designing a 3-D mathematical model of the contact lens based on the prescription; mathematically slicing the 3-D mathematical model into a number of thin and vertically superimposed layers, each layer having a defined thickness profile and a geometry corresponding to a cross-section of the 3-D mathematical model at a level of that layer; and converting a thickness profile and the geometry of each of a number of the thin and vertically superimposed layers into control signals that control a stereolithography machine to create, layer by superimposed layer, the contact lens in a bath of a crosslinkable or polymerizable contact lens forming material, wherein said contact lens forming material comprises one or more UV absorbing agents in an amount sufficient to reduce depth of penetration of a lens-forming material to a desired value.