The dangers of soft contact lenses_contact lenses_
Soft contact lenses are widely used contact lenses now. They use a hydrophilic synthetic polymer compound and are more comfortable to wear. But we know that whether it is a soft contact lens or a hard contact lens, its oxygen permeability has an impact on the cornea. Let's take a look at the dangers of soft contact lenses. Soft contact lenses are easily contaminated, which has a lot to do with its material. Because it is a water-containing soft material, it is also more prone to mold or contamination. If it is not strictly disinfected and sterilized, the soft invisible Glasses can easily breed bacteria, irritate the eyes, and cause eye inflammation. The common ones are corneal edema, corneal neovascularization and allergic reactions. Due to the high water content of general soft contact lenses, the preservatives in the contact lens syrup are also easily adsorbed on the lenses, causing allergic reactions of the eyes, and the eyes become more sensitive. The resistance of the eyes is reduced, the inside of the eyes is diseased, and the cornea is damaged. Because soft contact lenses are relatively firmly attached to the cornea, and because the cornea has no blood vessels and no oxygen, it needs to exchange tears to obtain oxygen and moisture in the air, and the cornea is softly invisible. The glasses are covered and cannot be exchanged well. Due to the lack of oxygen in the cornea, the eyes will not be able to metabolize well and the resistance will decrease. The cornea is more prone to problems, such as corneal ulcers, corneal perforation, etc., and the cornea will become thinner. Soft contact lenses have a relatively short lifespan, so they are not suitable for long-term wear. Many soft contact lenses have a relatively large diameter, larger than the cornea, and are prone to cause huge mouth-to-mouth conjunctivitis. Protruding particles grow on the inner side of the upper eyelid. If you wear contact lenses, it will become even worse. severe.