- Frame glasses are placed in front of the eyes, while contact lenses are directly attached to the front of the cornea. There is no apex distance effect of frame glasses. At the same time, according to certain optical principles, the degree of contact lenses for nearsighted people is slightly lower than that for frame glasses, while the opposite is true for people with farsightedness. .
Should I choose daily, monthly, or annual contact lenses?
If conditions permit, it is best to use frequent replacement (such as daily disposable) or monthly disposable contact lenses. Short-period contact lenses are more hygienic and can greatly reduce the incidence of complications.
Can I wear contact lenses to sleep?
The normal cornea needs "breathing". When the eyes are opened, the corneal oxygen supply mainly comes from the atmosphere. When the eyes are closed, it mainly comes from the corneal and conjunctival blood vessels, accounting for only 1/3 of the open eyes. Wearing glasses while sleeping can easily cause corneal hypoxia.
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