Pay attention to the dangers of wearing contact lenses in 4 periods
A lot of myopic patient can choose to wear contact lens, because light and beautiful characteristic a lot of time everybody is a day of wear, but it is to cannot wear for a long time actually, had considered the harm of contact lens?Small make up a summary of the situation should not wear contact lenses.
The damage of contact lenses to the cornea is mainly because it prevents the cornea from getting oxygen from the air and tears. Corneal hypoxia causes edema and easy shedding of corneal epithelial cells. When wearing or taking off the lens, it is easy to cause corneal epithelial skin breakage or defect.The corneal epithelium is a very important barrier of the eye. Once damaged, it can easily lead to corneal infection and corneal ulcer, and in severe cases, corneal perforation.Corneal ulcers are not easily treatable. If they can be controlled, they can also form leukoplakia, which can affect vision and sometimes require a corneal transplant to recover.
If you must wear contact lenses, you should first choose high-quality products, master certain wearing methods and use knowledge, develop good hygiene habits, and should not wear for a long time.
Contact lenses should not be worn under any of the following four conditions:
Don't wear contact lenses when you have a cold.Because of a cold when the hand often with a large number of viruses, when taking glasses virus easy to enter the eye.In addition, many anti-cold, cough and pain-killing drugs contain ingredients that suppress tears. Reduced tear production can make contact lenses too dry and opaque, which can affect vision.
2. Women should not wear contact lenses during menstruation.Because the female is during menstruation and will arrive a few days before, intraocular pressure is often higher than at ordinary times, around the eyeball is also easier to congestive, especially the woman with dysmenorrhea, if you wear contact lenses at this time, can have a bad effect on the eyeball.
3. Pregnant women should not wear contact lenses.Because pregnant woman hormone secretion changed, so that the water content inside the body also changed, some eyelid swelling, corneal thickening, especially after 3 months of pregnancy, the change is more obvious, will be matched with normal when the choice of contact lenses do not coincide, and cause eye discomfort.
4. Do not wear contact lenses when your immune system is weakened.Therefore, when the local resistance of the eyes decreased, the secretion of tears decreased, bacillus subtillans will multiply in large quantities, so that the bacterial metabolites deposited between the cornea and the lens, resulting in the reduction of contact lens oxygen permeability, the normal metabolism of the cornea was interfered, thus causing bacterial corneal ulcer.
