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US 10,371,964 B2Granted
Contact lens product
AssigneeLargan Medical Co., Ltd.
InventorsEn-Ping Lin, Wei-Yuan Chen, Chun-Hung Teng
Life of this patent
Estimating the term…
Abstract
A contact lens product includes a multifocal contact lens and a buffer solution. The multifocal contact lens is immersed in the buffer solution. The multifocal contact lens includes a central region and at least one annular region. The annular region concentrically surrounds the central region, and a diopter of the annular region is different from a diopter of the central region. The multifocal contact lens is made of silicone hydrogel or hydrogel. The annular region closest to a periphery of the multifocal contact lens is a first annular region.
Claims14
A contact lens product, comprising:
- a multifocal contact lens, comprising:
- a central region;
- and
- at least one annular region concentrically surrounding the central region, wherein a diopter of the annular region is different from a diopter of the central region;
- and
- wherein the multifocal contact lens is made of silicone hydrogel or hydrogel;
- and
- a buffer solution, wherein the multifocal contact lens is immersed in the buffer solution;
- wherein the annular region closest to a periphery of the multifocal contact lens is a first annular region, the diopter of the central region of the multifocal contact lens is PowC, a maximal diopter of the first annular region of the multifocal contact lens is PowP1, each of the annular regions comprises an absolute value of a slope, a maximum of all the absolute values of the slopes is SloPMax, a diameter of the central region of the multifocal contact lens is DiC, and the following conditions are satisfied:
- 3 D<PowP1−PowC;
- 2.4≤SloP Max;
- and
- 1 mm≤DiC.
10 more elements
Dependencies are inferred from the claim text.