2024-01-29 04:00:35
local
Written by: Xu Yun Photography: Wu Minhui
The cornea is at the front of the eyeball. It not only protects the eye from injury or infection, but also allows light to enter the eyeball. Only the cornea and lens in the eye structure can be replaced. In some cases, the cornea becomes no longer transparent and clear, and vision will deteriorate. Affected; Ophthalmologist Fan Jingyan analyzed why wearing “big eyes” will increase the risk of keratitis, in addition to the hidden traps of the CON artifact, and whether the cornea can heal naturally once it is damaged.
Guest host: Wu Xianglun
What is the difference between wearing contact lenses and wearing “big eyes”?
The surface of contact lenses is transparent. A layer of pigment is added to the surface of “Big Eyes”. Studies have shown that the pigment part forms uneven surfaces. Compared with smooth surfaces, rough surfaces are more likely to accumulate bacteria or amoeba, so Wearing “big eyes” may increase the risk of corneal infection; “big eyes” can be purchased in many ways on the market, unlike contact lenses, which require a doctor or optometrist to check and choose suitable lenses before wearing them, so both There is a big difference between them.
A layer of pigment is added to the surface of the big eyes, which can easily accumulate bacteria.
Why do big eyes increase the risk of keratitis?
Keratitis is an infection of the front part of the eye, which can be caused by bacteria, viruses, fungi, or even amoeba. Contact lenses will contact the cornea, so the risk is higher. If you wear “big eyes”, because the lenses Pigments cause unevenness and the risk of infection will be higher. In addition, the oxygen permeability of lenses with pigmented parts has always been questioned. Low oxygen permeability of lenses is detrimental to corneal health. Some “big-eyed” products claim that the oxygen permeability Undoubtedly the same as contact lenses, but the research has not been approved, so consumers should be careful before using them.
Can I avoid bacterial infection by using CON remover?
Generally speaking, when wearing or removing contact lenses, it is recommended to use clean hands. There is no research to prove that CON remover can effectively prevent infection. On the contrary, CON remover is not a disposable product. If it is used without thorough cleaning, it will increase the risk of virus infection. There is a risk of fungus or fungus. In addition, if the clamping part of the lens is used with improper force, it may be pulled off and damage the corneal epidermis.
Dr. Fan pointed out that removing the CON artifact will increase the risk of corneal infection.
Does daily eye makeup or eyeliner tattooing have any impact on the cornea?
There is no problem if you handle it carefully. However, if cosmetics or some substances are applied to the eyes for a long time, there is a chance that the surface of the cornea will be affected. As for the eyeliner tattoo, it is only the eyelid and has no effect on the cornea. However, during the process of tattooing, the instrument may be accidentally damaged. Injury to the cornea, or accidental entry of anesthetic into the eye during injection, will cause damage to the cornea, causing pain, eye watering, etc., and may even lead to vision loss due to infection, so special care must be taken during the steps and related treatments.
Under what circumstances will the cornea be damaged?
Fan Jingyan: When carrying out projects such as decoration or welding, if sand or foreign objects are accidentally thrown into the eyes, there is a chance that the cornea will be damaged. Dry eye syndrome can also easily damage the corneal epidermis. Some allergic symptoms include long-term use of steroids, If the cornea is infected by herpes or viruses, it may cause chips or damage to the corneal epidermis. Because the eyelids are close to the cornea, the eyelashes are inverted and the eyelids are entroped. These repeated frictions will also damage the corneal epidermis.
The cornea is at the front of the eye. Once damaged, it may affect vision.
What are the symptoms of corneal damage? Will it heal naturally?
In most cases, the eyes will hurt, with watery eyes and red eyes. In severe cases, it will affect vision. Some people will feel uncomfortable if their eyes are dry and blown by the wind. The cornea is divided into epidermis, middle part and underlying endothelial cells. If only the epidermis is affected, Damage, we call it epithelial cell damage. For example, if the skin surface is scratched, it will heal naturally. Injury to the middle part may affect vision. The endothelial part is damaged. If the cells are lost, it cannot be repaired. In some cases, corneal infection and inflammation affect the middle layer. cells, vision will decrease after recovery.
Can eye drops repair damaged cells?
It depends on the damaged area. The epidermis will heal naturally after being damaged. Using eye drops or artificial tears can help the wound heal faster. If the middle or bottom layer is damaged, eye drops may not be helpful, especially The underlying cells are damaged and cannot be restored with eye drops; in addition, when choosing eye drops, because some eye drops contain preservatives, dripping them too densely will have an impact on the eyes. Because dry eyes require eye drops, it is recommended to use preservative-free ones. agent products.
Doctor profile
Fan Jingyan – Bachelor of Medicine and Surgery of the University of Hong Kong, Fellow of the Royal College of Physicians of Edinburgh (Ophthalmology), Fellow of the British College of Ophthalmologists, Fellow of the Hong Kong Academy of Medicine (Ophthalmology), Fellow of the Department of Surgery of the Royal College of Physicians of Glasgow, United Kingdom, Master of Public Health of the University of Hong Kong.
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