Ortho-K, It is the cornea that we often say model lens, the inside surface has a lot of arc section, when wearing, can pass pressure to reshape cornea shape, prevent myopia development thereby. They are often confused because they are similar in appearance to regular contact lenses and are in direct contact with the eye. But in reality, the Ortho-K is very different from regular contact lenses.
Wearing time is different. Ortho-K belong to the type of night wear, wear at night before going to bed, the next morning to take off, during the day can no longer need to wear any glasses to achieve the effect of vision improvement. And common contact lens is worn in the daytime, only when wearing ability has correctional effect, and must control to wear time, avoid the influence of wind sand, dust even.