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Wouldn’t it be great if you could correct your eyesight, especially nearsightedness, and reduce your dependence on glasses and needn’t have eye surgery? The solution is called orthokeratology, or ortho-k (角膜塑形镜).
What is ortho-k?
Orthokeratology (oilho-k) is the fitting of specially designed contact lenses (隐形眼镜) that you wear overnight. While you are asleep, the lenses gently reshape the front surface of your cornea（角膜）so you can see clearly the following day after you remove the lenses when you wake up.
How Long does the ortho-k effect last?
You should be able to see acceptably well without glasses or contact lenses for a day or two, sometimes longer. For best results, one should wear the ortho-k lenses every night.
Who are good candidates for ortho-k?
Most people with mild to average nearsightedness are good candidates for ortho-k. Because the corneal reshaping effect is temporary, little risk is involved , and you can discontinue wearing the lenses at any time. Children and young adults who want to be glasses-free but are too young for eye surgery or are afraid of taking the surgery often are good candidates for ortho-k. People who participate in contact sports or work in dusty environments that can have problems for contact lens wear also can be good candidates.
How much does ortho-k cost?
Costs also can vary based on the region of the country and the type of practice where you have the procedure performed. Ortho-k prices in the US generally range from $ 1,000 to $2,000. But particularly difficult cases of ortho-k can cost as much as $4,000.
There are additional costs for lens care solutions and following up exams, which can total about $300 to $ 500 per year.
Finally, keep in mind that, as with all contact lenses, there are some possible side effects of wearing ortho-k lenses. Ask your eye doctor for details.
1. According to the passage, which way is introduced to correct eyesight?
A. Performing an operation on the cornea.
B. Applying contact lenses in the daytime.
C. Fitting proper glasses during the night.
D. Wearing specially designed contact lenses.
2. Which of the following statements is right?
A. You have to wear ortho-k day and night to ensure good results.
B. Ortho-k is a good choice for a man with average nearsightedness.
C.The cost of ortho-k in the city is higher than that in the countryside.
D.There is no need for people to worry about the side effects of ortho-k.
3. How much will a person pay for using oilho-k for the first year at least?
A. $1,000. B.$ 1,300. C. $1,500. D. $2,000.
