我举手，我知道。。

我儿子在用。不同的眼医，叫不同名子。有叫OK镜，有叫Gentle Vision Shaping System (GVSS)，原理一样。

The Gentle Vision Shaping System (GVSS) uses a vision retainer to gradually re-shape the front surface of the eye (the cornea) to temporarily eliminate or reduce nearsightedness (myopia) or astigmatism during waking hours. GVSS vision retainers are similar to contact lenses and are usually worn during sleep. They are removed upon awakening and provide clear vision without using glasses or contact lenses. Nightly wear is needed to maintain clear vision during the day. The retainers are comfortable and very easy to care for.
Patients can see all day without glasses, contact lenses or laser surgery. And by utilizing FDA approved materials, GVSS is a safe and effective option for both children and adults.
这要去专业的眼医那才有，蛮贵的。