What are the effects of wearing contact lenses on the cornea?

Contact lenses have a special process material, and efforts are made to minimize foreign body sensation during development, so the lens is highly compatible with the eye. However, due to the particularity of corneal tissue, it is still inevitable to have some effects on the cornea during the process of wearing a lens, how do we avoid these effects and what matters should we pay attention to?

Contact lenses are never fixed in the eye, but are relatively stable on the eyeball. Every time you blink, the lens will rotate, and the slight movement is within the acceptable range, but these are physical friction for the cornea, and if there is just a gap or damage on the lens, it will cause mechanical wear on the cornea. Therefore, the choice of base arc is very important, which is related to the problem of positioning accuracy, and we must also carefully observe before wearing the mirror to avoid wearing the damaged lens into the eye.

 The eyelid, which is often referred to as the eyelid, has an important protective effect on the eyeball, and blinking can not only shield external pollutants but also help disperse tears and so on. Wearing contact lenses is equivalent to foreign objects entering the eye, if the hygiene is not good, it will bring bacteria and viruses, leading to corneal infection or cause various eye diseases. Therefore, we must always do a good job of disinfection, but also do a good job of lens cleaning, to avoid excessive protein deposition breeding bacteria.

The hypoxia caused by wearing contact lenses mainly has two major reasons: insufficient oxygen permeability of the material and improper wearing method. Wearing for too long or wearing a mirror to sleep will lead to severe hypoxia of the cornea. Long-term hypoxia will cause neovascularization reaction, may also cause keratopathy or other eye complications, it should be noted that this effect is not immediate and continuous accumulation, so the wearer must regularly review, maintain good use habits.

Wearing contact lenses can increase friction, but the argument that wearing lenses causes cornea aging and thinning is exaggerated and has no scientific basis, let alone a conclusion that has not been rigorously controlled. Corneal epithelial cells are constantly replacing new and old cells with metabolism, which is a natural phenomenon and is not controlled by wearing a mirror. Therefore, it is recommended that you wear contact lenses scientifically and reasonably, operate in strict accordance with the instructions, wear lenses for less than 8 hours a day, and try to buy high-permeability short-cycle products.