| 摘要 |
PROBLEM TO BE SOLVED: To correct a code of dyschromatopsia lowering the saturation threshold of retina pigment of a person of dyschromatopsia by applying filming or coating which absorbs a certain amount of visible ray of a certain wavelength to the lens surface of his glasses. SOLUTION: The surfaces of the lenses composing glasses are applied with filming or coating which absorbs a certain amount of visible ray of at least one wave length chosen from 440nm, 497nm, 530nm, and 560nm. This treatment is generally preferred to be multiple layered filming or coating. Although the material used for the treatment has no restriction, inorganic oxides of silica or titanium vaporized through vacuum evaporation apparatus are preferred. Also, the thickness of filming or coating has no restriction but it should be selected to be the one which so distributes energy of visible spectrum that it is matched with the purpose of correcting dyschromatopsia. Thereby, correcting dyschromatopsia by lowering a saturation threshold of retina pigment of a person in dyschromatopsia. |
