First, you shouldn't wear contact lenses when you have a cold. This is because when people catch a cold, they often carry a lot of viruses on their hands. When they hold or wear glasses, these viruses can easily enter their eyes. In addition, colds are often accompanied by mild retinal inflammation, and wearing contact lenses will aggravate the inflammation. In addition, many anti-cold, antitussive and analgesic drugs contain ingredients that inhibit tears. Reduced tear secretion will make contact lenses too dry, reduce transparency and affect vision.

Second, people with allergies can't wear contact lenses. If people with allergic constitution wear contact lenses, it will cause slight inflammation, itchy eyes, redness, conjunctivitis and swollen eyes. If these diseases are not treated for a long time, they may endanger vision.

Third, women should not wear contact lenses during menstruation. Because women's intraocular pressure during menstruation and a few days before menstruation is often higher than usual, and the eyeball is more prone to congestion, especially for women with dysmenorrhea. If you wear contact lenses at this time, it will have a negative impact on the eyeball.