Extended data:
Precautions for purchasing:
1, the purpose of the lens.
Lenses can be used to correct common myopia or hyperopia, and can also be used to correct high ametropia; Can be used to correct non-astigmatism ametropia, and can also be used to correct high corneal astigmatism, even keratoconus; Can be used for daily wear, night wear or long-term wear (continuous overnight wear for many days).
2. Considering the patient's condition.
3. Selection of materials for orthokeratology lens.
Orthokeratology is a special RGP lens, which is used to change several existing forms of cornea. Meanwhile, most patients wear them at night.
Baidu encyclopedia-orthokeratology mirror