Two-week polishing is an ideal replacement cycle. Because no matter what kind of lens, the protein deposition on the lens in the third week will increase sharply.
However, silicone hydrogel lenses are easier to absorb lipid deposits, so the comfort is usually better in the first two weeks, and the comfort is obviously reduced in the third week.
Extended data:
The higher the water content, the softer the lens is, but it is also more prone to deformation and damage, and the lens is more prone to water loss. On the contrary, the lower the water content, the better the formability of the lens, the smaller the deformation degree, and it is not easy to dehydrate compared with the high water content lens.
Daily throwing is the healthiest way to wear contact lenses, followed by two-week throwing.
Traditional contact lenses actually hide a lot of harm, because people's tears, magazines or foreign substances in the external environment of secretions will attach to the lenses to form deposits. Even if you use nursing lenses every day, there will still be a lot of residues on the lenses.
With the increase of wearing time, the deposits accumulate more and more. In the later period of use, the lens will become blurred and uncomfortable to wear, which will also affect the clarity of vision and easily cause eye diseases.
The medical and optometry circles all over the world have reached an understanding of wearing contact lenses, that is, the shorter the lens, the healthier it is, the cleaner the lens, the more comfortable it is to wear, and the lower the chance of suffering from eye diseases. In order to make glasses more healthy and comfortable, it is recommended to replace contact lenses for a short time.
References:
Baidu encyclopedia-contact lenses
Baidu Encyclopedia-Johnson Bright Eyes