Method for designing progressive refraction lens, method for manufacturing the same, and eyeglasses lens supplying system
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United States of America Patent
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Jun 14, 2011
Grant Date -
Dec 31, 2009
app pub date -
Jul 18, 2007
filing date -
Jul 20, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A subject matter is to provide an efficient method for designing a progressive refraction lens in consideration of not only its optical performance but also its appearance performance. The method for designing the progressive refraction lens includes a step (S030) for determining addition power of an entire lens that is a summation of addition power of a front surface and that of a back surface and a step (S040) for determining the addition power of the front surface. The method for designing the progressive refraction lens is characterized in determining to make the addition power of the front surface not less than 0 but smaller than that of the entire lens in the case that the appearance performance is considered to be more important than the optical performance while determining to make the addition power of the front surface larger than that of the entire lens in the case that the optical performance is considered to be more important than the appearance performance.
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