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US 11,898,076 B2Granted
Contact lens and contact lens product
AssigneeLargan Medical Co., Ltd.
InventorsWei-Yuan Chen, Po-Tsun Chen, Wei-Chun Chen, Chun-Hung Teng
Life of this patent
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Abstract
A contact lens includes at least one color changeable region, wherein the color changeable region includes at least one photoluminescence material. When a wavelength of the photoluminescence material having a maximum radiation intensity is WEmMx, an average transmittance in a wavelength range of 400 nm-700 nm of the color changeable region is T4070, a size of a total area of the color changeable region is AC, and a size of a total area of the contact lens is AL, certain conditions relating to WEmMx, T4070 and AC/AL are satisfied.
Claims14
A contact lens, comprising:
- at least one color changeable region, wherein the color changeable region comprises at least one photoluminescence material;
- wherein a weight percentage of the photoluminescence material in the contact lens is WP, an average transmittance in a wavelength range of 400 nm-700 nm of the color changeable region is T4070, an average transmittance in a wavelength range of 280 nm-400 nm of the color changeable region is T2840, and the following conditions are satisfied:
- 0.01%≤WP;
- 85%≤T4070;
- and
- T2840≤20%.
3 more elements
Dependencies are inferred from the claim text.