METHOD FOR PRODUCING SPECTACLE LENS
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United States of America Patent
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Issued Date -
Apr 18, 2024
app pub date -
Oct 25, 2021
filing date -
Dec 24, 2020
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Abstract
A method for producing a spectacle lens, the method including: determining the positions of at least three marks so as to specify the center position of a frame shape on the basis of the at least three marks; making marks at the determined positions; calculating the shape of a non-optical surface of a semifinished lens with respect to the center position when processing the non-optical surface according to a prescription; and processing the non-optical surface into the calculated shape with respect to the center position. When the semifinished lens is viewed in an optical axis direction, the at least three marks include a pair of marks located on a first straight line passing through the center position and a mark located on a second straight line that is orthogonal to the first straight line and passes through the center position.
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