What's the difference between orthokeratology and rigid contact lenses?

1, which have different functions. Orthokeratology mirror, also known as ok mirror, uses the back surface of its lens to press the front surface of the cornea, making the curvature of the corneal surface flatter, thus achieving the purpose of reducing myopia; Contact lenses are what we often call contact lenses. Its function is to correct vision and see more clearly when worn.

2, wearing time is different, wearing ok glasses at night; Ordinary contact lenses should be worn during the day and taken off when sleeping.

3. Contact lenses generally include soft and semi-hard (also known as rgp, which is difficult to wear, difficult for first-time wearers to adapt and expensive, and there are still not many domestic wearers); Ok lens is a kind of hard lens with high oxygen permeability (otherwise it can't be worn at night because the cornea needs oxygen), but its shape is different from that of ordinary hard lenses. It has multiple basic arcs and a larger lens diameter.