Contact lens having a moiré structure, contact lens moiré structure processing method
Contact lens includes central optical zone for clearly focusing image of incident light onto retina clear central image region of user's eyeball and peripheral optical zone surrounding central optical zone, and one or multiple moiré portions located on peripheral optical zone for focusing the image of incident light onto peripheral out-of focus region of retina of user's eyeball. The moiré portions are processed by: using an aberrometer to measure aberration of retina of user's eyeball and to further generate a three-dimensional image map, dividing the three-dimensional image map into clear central image region and peripheral out-of focus region, and then using an aberration correction software to calculate the power of sphere and the power and axis of cylinder on contact lens and then inputting the three-dimensional image map into processing machine for enabling the processing machine process the desired moiré portions on contact lens according to the three-dimensional image map.
1. A contact lens, comprising opposing outer surface and inner surface, a central optical zone located on said outer surface and said inner surface for the passing of light to focus a clear image on a clear central image region of a retina of a user's eyeball, a peripheral optical zone located on said outer surface and said inner surface and surrounding said central optical zone, and at least one moiré portion located on said peripheral optical zone for the passing of light to focus an image on a peripheral out-of focus region of said retina of said user's eyeball;
wherein each said moiré portion comprises a first pattern and a second pattern respectively located on said outer surface and said inner surface and superimposed to form a moiré pattern, said first pattern and said second pattern each being respectively formed of a respective grating that is a regularly spaced collection of essentially identical, parallel, elongated elements.
2. The contact lens as claimed in claim 1 , wherein each said moiré portion comprises said first pattern located on said outer surface of said contact lens, a light-transmitting material layer located on said outer surface of said contact lens, and a third pattern located on said outer surface of said light-transmitting material layer opposite to said first pattern and superimposed on said first pattern to form a moiré pattern, said first pattern and said third pattern each being respectively formed of a respective grating that is a regularly spaced collection of essentially identical, parallel, elongated elements.
3. The contact lens as claimed in claim 1 , wherein said at least one moiré portion is located on said peripheral optical zone in one of ninety degrees, one hundred and eighty degrees, two hundred and seventy degrees and three hundred and sixty degrees.