Contact lenses for reducing myopia and methods for making the same

Abstract

A method of making a contact lens includes providing a cylindrical blank for the contact lens, the cylindrical blank including a first portion and a second portion. The first portion is formed from a homogenous, optically clear material and the second portion is formed from an inhomogeneous, optically-scattering material. The method includes shaping the cylindrical blank to provide the contact lens. The contact lens includes a first region surrounded by a second region, the first region being formed from the homogenous, optically clear material and the second region being formed from the inhomogeneous, optically-scattering material.

What is claimed is: 
     
         1 . A method of making a contact lens, comprising:
 providing a cylindrical blank for the contact lens, the cylindrical blank comprising a first portion and a second portion, the first portion being formed from a homogenous, optically clear material and the second portion being formed from an inhomogeneous, optically-scattering material; and   shaping the cylindrical blank to provide the contact lens,   wherein the contact lens comprises a first region surrounded by a second region, the first region being formed from the homogenous, optically clear material and the second region being formed from the inhomogeneous, optically-scattering material.   
     
     
         2 . The method of  claim 1 , wherein the first portion is a cylindrical portion and the second portion is a cylindrical, annular portion surrounding the first portion. 
     
     
         3 . The method of  claim 1 , wherein the first portion is a first cylindrical layer and the second portion is a second cylindrical layer adjacent the first portion, the first and second portions having the same diameter. 
     
     
         4 . The method of  claim 1 , wherein the first portion is a conical portion embedded in the second portion. 
     
     
         5 . A method of making a contact lens, comprising:
 forming a plurality of discrete dots of material in a pattern on a transfer substrate;   aligning the pattern with a surface of a contact lens;   contacting the pattern with the surface of the contact lens; and   releasing the dots of material from the transfer substrate while the dots are in contact with the surface to transfer the pattern of dots to the surface of the contact lens.   
     
     
         6 . A button for making a contact lens, comprising:
 a first region formed from a homogenous, optically clear material; and   a second region formed from an inhomogeneous, optically-scattering material;   wherein the button is shaped as a cylinder.   
     
     
         7 . The contact lens button of  6 , wherein the first region is a cylindrical inner core and wherein the second region is an annular cladding surrounding the first region. 
     
     
         8 . The contact lens button of  6 , wherein the first region is a bottom layer and the second region is a top layer, and wherein the top layer and the bottom layer form an interface substantially parallel to the first flat surface and the second flat surface. 
     
     
         9 . The contact lens button of  6 , wherein the first region is a cone, and the second region is configured to surround the first region.