To sum up, RGP has the advantages of high imaging quality, stable visual field, wide visual field and lasting and clear imaging.
RGP has a good effect on high corneal astigmatism and irregular astigmatism, and it is irreplaceable.
This is because RGP is not directly attached to the corneal surface when it is attached to the cornea, but is adsorbed on the outside of the tear layer through the tear layer, and the tears are always in an exchange circulation state, and the surface tension of the tears always attracts the lens stably. For example, there is a layer of water between two glass plates. The lens slides when you blink, but it doesn't actually touch the cornea. Very safe.
Astigmatism is mainly caused by different curvature on cornea. After wearing RGP, a tear lens layer is formed under the lens to make up for the difference in curvature. Simply put, the tear lens layer formed by RGP makes the cornea perfect!
The above is a simple statement of RGP. Let's talk about the RGP I have contacted.
We have been making RGP for doctoral universities, but as you said, it is very expensive. Judging from the trial effect, many of our customers usually choose to use RGP on their own initiative without our recommendation after trying on optometry. There is a simple reason. It is much clearer than frame glasses, and there is no bondage of heavy lenses, and there is no peripheral vision that is seriously deformed.
My brother-in-law is also a high-power lens wearer, whose diopter is above 12.00DS, and the corrected vision with ordinary frames is around 0.7. At the initial stage, the corrected vision of one eye can reach 0.9, and after continuous use for half a month, the corrected vision of one eye can reach 1.2. The frame is also equipped, but he is still willing to use RGP. Although it also reflects the feeling of foreign body when wearing eyes for the first time, the symptoms almost disappeared after one month. In fact, compared with soft lenses, RGP is not easy to accept at first, but because of the superiority of RGP material, it gives lenses more innate advantages. For example, high oxygen permeability and wearing soft glasses overnight are very dangerous, while RGP made of general materials can provide relatively safe oxygen supply when eyes are closed. XO RGP can even be worn all night, which is very suitable for lazy people (of course, for your health, we still don't recommend lazy people for a long time, it is healthier to take off your glasses for the night).
Under the high power electron microscope, the material of contact lens is like a net. Due to the limitation of materials, soft lenses will absorb many impurities during use, which will seriously affect the oxygen permeability after long-term use. However, RGP hardly adsorbs anything. For the cleaning of RGP, it can even directly wash the lens with pure water, and the current technology of soft mirror can't do it anyway.
In fact, in terms of service life, RGP has a service life of more than two years under reasonable use, and the average daily price is not unacceptable. You know, you won't always wear new clothes. RGP will accompany you to study and work all day when you wake up every day to improve your quality of life. Personally, if measured by money alone, the price is not high.
Regarding the control of RGP on the development of juvenile myopia, Peking University Optometry Center, Tianjin Eye Hospital, Eye, Otolaryngology Hospital affiliated to Fudan University and Optometry Center affiliated to Sun Yat-sen Medical University have related topics, and domestic first-line hospitals are also trying to promote the use of RGP to control juvenile myopia. You are from Shanghai. I recommend that you go to the Eye, Otolaryngology Hospital affiliated to Fudan University to consult the application of RGP in controlling the development of myopia. Our national research laboratory for the development and control of juvenile myopia is located in Fudan (directly funded by the state), and I believe you will get more information there.
The above content is purely manual, and there is no copy and excerpt. Welcome to ask questions and add. I will continue to pay attention!
Supplement: Long-term wearing of RGP does affect corneal curvature. According to the data released by Peking University Optical Center, RGP will flatten the curvature of the central part of cornea, which is actually beneficial to myopia. The cornea itself has a certain elastic range. If you don't wear RGP for a long time, the cornea will definitely change. In contrast, OK lens is related to RGP to some extent, but it is completely different in design and use. OK lens needs to be relatively tightly fitted in the center of the lens, and a relatively flat area is pressed out in the center of the cornea according to the previous design. After the plasticity is completed, OK lenses can also have good vision, which usually lasts for about one day, but they will return to their original state if they are stopped. In this way, the plasticity of OK lens itself is much greater than that of RGP, but the cornea can still return to nature after stopping wearing it, and the effect of RGP on cornea is really too small.