Contact Lense: Don't Negelect These Key Points When Wear It - By: venturiwang

Rencently, a kind of contact lens which could enlarge the apple of one's eye or change the color of eye is popular among on the market, causing many eye problems. As this contact lens have taken on dyes, and the surface of dyeing parts can be found uneven under the microscope, so they are easily attached to dirt. If not disposable lenses, they are much more likely to infect. The stained glasses are also less oxygen, if worn too long, the cornea is easy hypoxia, and cause infection. Therefore, many cases of corneal ulcer or erosion are caused by wear this kind of lenses for long time.

Another disadvantage is that if the dyeing space is too large and pupils will easily obscure central vision when dilated at night, or lens will slide when blink. It can also cause blurred vision when pupils are obscured by dye, so to drive at night or engage in higher risk activities, people had better not wear this kind of cantact lens.

Unproperly cleaning and long time wearing with the lens, it is most likely to cause problems. If people don't know how to clean the lens, they had better choose daily disposable contact lenses. The biggest problem for contact lens is to wear for long time. General recommendation is to wear contact lenses one day less than 8 hours, or sleep time pluses 4 hours is acceptable to wear the longest time. However, the high percentage of people with high myopia wear contact lenses for a longer time, so almost contact lens family wear contact lens all the time, and often causing corneal hypoxia.

Therefore, adequate sleep is necessary for the people who take glasses for long time; if sleep six hours a day, plus 4 hours means wear lens time can be up to 10 hours, if sleep enough to 8 hours, wearing time can be up to 12 hours.

Corneal epithelial cell hypoxia will easily cause infection, if leave scarring and produce white pot, it may affect vision. But if the endothelial cells hypoxic, the number of cells will reduce and its shape looks abnormal and can not maintain the cornea clear, serious paicients even to get corneal transplant to restore vision, hence, contact lenses family should be more careful.

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