| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem: the process for manufacturing differential thickness lenses typically includes a curing step, which may involve UV, heat, or other similar curing process, however, as a result of the curing step, the material of the lens shrinks at different rates due to the differential thicknesses. SOLUTION: Regarding the method of producing the contact lens 10 that is compensated for power deviation from target due to differential shrinkage, the method includes the steps of: designing the lens 10 to have a first area having a first thickness and upper and lower areas 14 and 16 each having a second thickness different from the first thickness and a cylinder axis; dividing the whole angular ranges of the cylinder axis into a plurality of angular ranges and determining a plurality of power correction factors, one for each of the divided angular ranges; and modifying the lens using a selected one of the plurality of power correction factors corresponding to the cylinder axis ranges of the lens containing the cylinder axis of the lens. COPYRIGHT: (C)2011,JPO&INPIT
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