Lenses with progressive addition power.

摘要

A method for designing a progressive lens surface comprising: specifying the average power of a plurality of points distributed over the entire lens surface; specify the height of the lenses around the edge of the lenses, and determine the height of the lenses at the plurality of points consistent with the specified average power and the height of the edge of the lenses, which comprises finding a unique solution of a differential equation Partial of the elliptical type subjected to the limit condition of the edge height of the lenses.