Comment expert: Tang Ping, colleagueOptitometry CenterTechnical Director
Correct the misunderstanding: Contact lenses don’t actually touch the cornea directly
Does the contact lens wear the cornea? The contact lens does not touch the surface tissue of the cornea at all. No human body has noticed this at all.
Tang Ping, technical director of Tongren Optometry and Optician Center, pointed out that when wearing contact lenses, there is a layer of “tear fluid” between the lens and the cornea. The lens is equivalent to lubricating and protecting the human eyes. The effect of tears is cut into two. Therefore, the lens that can’t fit the cornea is bound to be impossible to wear and abrade the cornea.
In addition, human corneal cells are not static and less and less. They protect the internal tissues of the eye through normal natural shedding and regeneration. The corneal cells will play a protective role if the eye is stimulated by wind and sand fans. And fall off, but can regenerate and recover within 24 hours.
Therefore, the loss of human corneal cells is not so terrible, and it will not become less and less and eventually blindness. It is really improper wearing and unclean nursing methods for corneal injuries, such as wearing extraordinarily time, unclean hands, causing corneal infection and damage.
correct the misunderstanding: modern production technology rarely does not fit the situation
Speaking of the inconsistency of contact lens concave and corneal convexity, this situation is It has been found less and less in the current production technology. Tang Ping pointed out that if the problem of concave-convex molding is pushed forward ten years, it may happen. But with the development of medicine and technology, this kind of problem is relatively rare in outpatients.
contact lenses belong to the third category of national medical devices, and they must be strictly reviewed and approved for marketing. Therefore, as long as you go to a regular eyewear shop to buy regular brand products, you can subsidize unevenness, hypoxia, and other issues. Don’t worry too much.
In addition, the corneal leukoplakia mentioned in the Internet news, which is caused by the complications of infectious keratopathy or corneal trauma, has nothing to do with the problem of hard spectacle concave-convex molding, which has a low probability of occurrence.
Precautions against danger: Not suitable for wearing in dust and laboratory environments
Contact lenses are the crystallization of modern technology and wisdom, and in many ways help humans avoid wearing frames The inconvenience caused by the mirror. While discussing the hidden dangers of contact lens wearing, we must also discuss how to correctly choose, wear, care and replace contact lenses.
Tang Ping reminds everyone that people who often stay in a dusty and volatile chemical reagent space for a long time should try not to wear contact lenses. The reason is easy to understand. Dust and volatile chemical reagents are easy to adhere and change with the materials of contact lenses, which will further affect eye infection and even damage.
Prevention of danger:Stomach diseasePatients andSkin diseasesPatients wear Taboo