Why are there deposits contact lenses?

Contact lenses have strong hydrophilicity, and under normal circumstances, they present a soft texture to avoid foreign body sensation after wearing; but at the same time, contact lenses are also very easy to absorb impurities, so there are often a lot of precipitates on the lenses taken out of the eyes. . So, why are there these deposits on contact lenses, and how do we remove them?

The main components of the deposits on contact lenses are generally proteins, lipids, inorganic salts and other substances, most of which are derived from the corresponding components in the tear fluid. These components adhere to the lens and become a place for bacteria to multiply and grow. It can also cause discomfort such as blurred vision and itchy eyes. In severe cases, it can also cause eye inflammation and cause lens opacity or even deformation.

Then why do deposits appear on contact lenses? After all, contact lenses are foreign bodies. After they are worn, they will trigger an immune response in the eyes, leading to an increase in the secretion of tears. They will also absorb dust, wool and other substances due to electric charges. With the prolonged wearing time, the deposits will accumulate more and more, if not thoroughly cleaned, it is easy to block the oxygen permeation holes of the lens.

Therefore, in the daily care of the lens, it is necessary to do a good job of cleaning. After removing the contact lens from the eye, you should drop the care solution in time and rub it with your fingertips to clean it. The double box that stores the lens must also be disinfected regularly. If necessary, you can also use a more powerful hydrogen peroxide care solution to soak the invisible glasses.

After the deposit is produced, it will not only shorten the service life of the contact lens, but also negatively affect the physiological function of the eye. Therefore, once any unremovable deposits are found on the lenses, they should be immediately discarded and replaced with a new pair of contact lenses.