Contact lenses have freed many people from the shackles of frame glasses, but many people seek medical treatment because of improper use. To ensure that contact lenses can be used safely, it is important to know when contact lenses should not be worn.
Firstly, don't wear contact lenses if using computer for a long time. When working on computer for a long time, the blink times are reduced, the tear secretion is insufficient, the eyes are very easy to dry and fatigue, wearing contact lenses easy to make the eyes in a hypoxia and tension state, resulting in excessive use of the eye.
Secondly, female should not wear contact lenses during menstruation and pregnancy. During physiological period, intraocular pressure is high, cornea easily congestion, wearing contact lenses will cause inflammation, and during pregnancy, due to endocrine changes, corneal thickness increases, wearing contact lenses will easily damage the cornea
Thirdly, don't wear contact lenses when flying. The air in the cabin is relatively dry then normal, coupled with the change of air pressure, wearing contact lenses is easy to aggravate hypoxia and edema, produce a strong sense of foreign objects.
Fourthly, poor resistance should not wear contact lenses. When people have a cold or fever, wearing contact lenses tends to aggravate inflammation, and because cold medicines contain ingredients that suppress tears, they tend to dry out.
Fifthly, the weather such as blowing sand gale should not wear contact lenses. In extreme weather conditions, particles such as sand and dust easily adhere to the lens, causing eye discomfort. Besides, windy weather will accelerate the evaporation of lens moisture, aggravating the dry eye symptoms.
Sixth, water - related sports should not wear contact lenses. The water used for swimming, bathing in hot springs, water recreation and other activities is not sanitary enough, and there are many bacteria in the water. Once entering the eyes, it will not only be harmful to lenses, but also cause infection and even blindness.
Seventh, who has the fundus disease should not wear contact lens. Contact lenses are not recommended for patients with keratitis, conjunctivitis, trachoma, xerophthalmia, trichiasis, etc.