Orthokeratology has two advantages:
First, the effect is immediate, and the vision can be restored to 0.8 and 1.0 within 600 degrees the next day without wearing glasses.
Second, the number of degrees can be delayed and controlled, and the number of degrees will also increase, that is, it will increase slowly, by 25, 50 and 75 per year.
There are three disadvantages. First, it is not safe. Put it in children's eyes, it needs strict aseptic operation and is easy to be infected. Although the oxygen permeability is high, it is still easy to lack oxygen, which is easy to cause corneal ulcer and needs to replace the cornea. Second, there is no long-term effect. Whether wearing orthokeratology lens 1 year, 2 years or 10 years, the naked eye vision is worse than before, and the degree is higher than before. Third, the price is relatively high. 5000- 10000, and the cost of nursing fluid in 200 yuan is more than 2000 per month. The service life of each pair of orthokeratology lenses is 1-2 years.