Colored contact lenses are actually the registered trademark of Johnson & Johnson. Because Johnson & Johnson’s contact lenses have a certain influence in the market, everyone gradually calls colored contact lenses “coated contact lenses”.

Colored contact lenses were the first to appear in Korea. They were primarily used by celebrities on stage as colored contact lenses. Since they come in a variety of colors and can make the eyes look bright, they later became very popular among beauty-loving ladies. . Soon it became popular in South Korea, Japan, China, Europe and the United States. Because Johnson & Johnson was one of the first companies to enter China's colored contact lens market and has the greatest influence, everyone among the public regards colored contact lenses as synonymous with colored contact lens products.

Achromatic contact lenses are generally dyed light blue in order to increase the visibility of the lenses and make them easier to care for and operate. Their function of correcting vision is basically the same as colored glasses.

Colored contact lenses are also called contact lenses. In addition to correcting vision, they also have uses in beauty and medical treatment. Changing the color of the iris through lenses with a certain concentration of color has a fashionable beauty effect and is generally for personal and professional needs.

In clinical applications, it is generally used to cover corneal leukoplakia. It plays the role of artificial pupils when the iris is defective. Wearing red contact lenses can also change the sensitivity of color-blind eyes to the brightness of red and green colors. Differentiation, but it does not actually improve color discrimination ability.

Because there is a layer of color material in the contact lens, which is more than that of non-colored contact lenses, its thickness is also increased relatively speaking, which makes the oxygen conductivity of the contact lens (Dk/L )reduce. Generally speaking, oxygen permeability (Dk) is directly proportional to the water content. The water content of some contact lens lenses can reach 58. Their oxygen permeability is high and their durability is satisfactory. However, because most of them are made of ionic materials, , so it is easy to form precipitation