Patent ID: 7364674
Filing Date: 2008-04-29
Classification: A61F,A61L,B29D

Abstract:
1. A method of forming an optical device for surgical insertion into the cornea of an eye as a corneal implant, said method including the steps of: a. providing a polymer film having first and second surfaces; b. forming tracks in said polymer film by exposing said polymer film to a first source of radiation; c. etching said tracks to form at least some pores in said polymer film which connect said first and second surfaces; d. widening by etching at least some of said pores to dimensions large enough to permit the ingrowth of corneal tissue; e. providing a first mask; and f. reducing the transmission of at least a first portion of said polymer film to at least certain wavelengths of visible light by exposing said first portion of said polymer film to a second source of radiation through said first mask to produce the corneal implant wherein said step of reducing said transmission is achieved by the step of forming a diffraction grating designed to reflect pre-selected wavelengths of visible light while transmitting other wavelengths.