Why can wearing contact lens cause dry eye disease?

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Why can wearing contact lens cause dry eye disease?


As the pace of life accelerates, many people choose to wear contact lenses in pursuit of convenience. However, the risk of wearing because of dry eyes is very high. So, today we're going to talk about why wearing contact lenses can cause dry eyes.
If you always wear contact lenses, corneal wear and severe hypoxia, normal metabolism is blocked, will lead to the decline of eye resistance, and pay attention to fatigue. In the short term, the wearer will produce some foreign body sensation, dry and itchy eyes, increased eye excrement, blurred vision and other symptoms, but if so in the long term, it will slowly evolve into dry eye disease.
 
In addition, when not wearing contact lenses, in order to maintain water in the eyes, tears stably cover the eyeball, which will form a thin tear film, not only avoid the evaporation of tears too fast and can also block the external foreign bodies into the eyes to a certain extent. But when we put on the contact lenses, we turn to the lens covering the eyeball, and rotate with the blink of an eye, which will break the stability of the tear film, so you will find that the tears evaporate faster after wearing the lens. On the one hand, this is because the contact lens water evaporates quickly, and the demand for tears is very large, on the other hand, because the tear film is not protected, and the tears themselves inevitably continue to evaporate.

Long-term wearing of contact lenses usually wear corneal epithelial cells seriously, and eye edema and allergic reactions are more common. In this highly sensitive state, eyes in a sub-health state are more likely to "get sick". Insufficient secretion of tears for a long time will develop into dry eye disease, accidentally exposed to the foreign flora will suffer from keratitis, and wearing damaged lenses may cause corneal ulcers and even perforation. Even if timely treatment is given, the loss of vision caused by some diseases cannot be reversed.
So, can people with dry eyes still wear contact lenses? Regardless of the severity of Cheng's illness, author recommends that it is best not to wear contact lenses. Because of various side effects, dry eye tears secretion obviously can not meet the needs of wearing glasses, the additional use of eye lotion and other products is not a long-term solution, long-term wear will aggravate the condition, and have the risk of causing other diseases oh!
 

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