A MANUFACTURE METHOD OF NATURAL DYE AND USING CONTACT-LENS DYEING FOR CORRECTING A SET OF COLOR VISION DEFICIENCY

摘要

PURPOSE: A method for manufacturing a contact lens for correcting dyschromatopsia is provided to improve color distinguishing ability using environmentally-friendly natural dye. CONSTITUTION: A method for manufacturing a contact lens for correcting dyschromatopsia comprises: a step of dipping a lens in distilled water and heating; a step of redipping the lens in ethanol; a step of dipping the lens in a natural dye solution of red color; a step of washing the lens and dipping in a mordant solution; and a step of stabilizing the lens. The dye solution is a squeezed juice obtained from safflower, cochineal, madder, acacia, and Reynoutria elliptica.