We know that if you wear orthokeratology glasses, the shape of the whole cornea will change. When sleeping at night, the cornea will be shaped by the rearrangement of tears, so that parallel light enters the eyes and the focus falls on the retina. In this case, many people will ask how to match the frame glasses with orthokeratology lenses, so they need to stop using them for about two weeks, and then do mydriasis optometry to see the real refractive state, and then try on the glasses with compound light. The glasses made in this way are accurate.
In fact, if you wear orthokeratology lens for a long time, there may be some safety hazards. For example, it may cause certain damage to the cornea. So many people need to have a pair of suitable glasses. At this time, they must be equipped with a pair of very accurate degrees, otherwise they will not achieve the desired effect of frame glasses.
Orthokeratology mirror is made of breathable hard contact lens material, also known as RGP material. RGP is the abbreviation of Rigid Gas Permeable, which is "breathable hard material". It is developed on the basis of airtight hard material PMMA. The "OK mirror" often seen in the market is actually a orthokeratology mirror.