I went to the optical shop two days ago and heard that there is a kind of contact lens, which can correct my vision by sleeping at night. Do you have this?

What you call "sleeping for myopia" is something called "orthokeratology".

"Corneal plastic lens" refers to various lenses made of RGP (rigid gas permeable contact lens), including ORTHO-K, RGP (commonly known as "OK lens") and MCT (so-called digital corneal plastic lens). Their names are varied, but they are all made of rigid breathable contact lenses.

After June 2002, orthokeratology mirror was approved by FDA for the first time (approval number PMA number P870024). Orthokeratology mirror was approved by FDA for the second time in 2004 (approval number PMA number P0 10062). Note: they are all orthokeratology lenses! In 2009, all orthokeratology lenses imported from the United States in China used one of these two approval numbers.

The "approval" or "certification" of the FDA in the United States is actually a kind of "cognition", that is, the "cognition" of the documents submitted by American manufacturers to the FDA. The FDA of the United States does not participate in the writing of documents submitted by American manufacturers to the FDA, nor does it participate in the process of orthokeratology experiments by American manufacturers.

Orthokeratology has many disadvantages. According to the above-mentioned orthokeratology lens manufacturers themselves, there are as many as ten "shortcomings" of orthokeratology lenses listed to the US FDA. The original text of the "shortcomings" of orthokeratology mirror quoted by the manufacturer of orthokeratology mirror to the FDA of the United States is as follows:

"Adverse reactions (problems and countermeasures) should inform patients that the following problems may occur:

Eye tingling, burning, itching (irritation) or other eye pain.

Comfort is lower than when the lens is first worn on the eyes.

There is a feeling of foreign body or scratch in the eyes.

Excessive tears in the eyes

Abnormal eye secretions

Red eyes

Reduced visual acuity (poor visual acuity)

Blurred vision, rainbow or halo around an object.

Sensitive to light (photophobia)

Dry eyes "

Orthokeratology will make the center of cornea thinner and the curvature of cornea irregular. What did the manufacturer of orthokeratology lens in the United States say in the approval document? American manufacturers of orthokeratology reported to FDA that our testing time is only 3-9 months; The number of people is only about 200, and some people "quit" halfway; Some people still have problems wearing them. Therefore, there is no data about corneal thickness thinning and irregular corneal curvature, so we will not comment.

American orthokeratology manufacturers have never said that orthokeratology can be used for children's general myopia! ! !

Applying orthokeratology to children's myopia is an "invention" of some unscrupulous salesmen and some ophthalmologists or opticians in China. Applying orthokeratology to children's general myopia is an abuse of scientific and technological products. These orthokeratology lenses are all made of rigid breathable contact lenses, so they are classified as "medical devices" by FDA and SFDA in China.

Orthokeratology is designed for myopia patients with keratoconus and other myopia patients with special corneal diseases. It is a last resort for patients with keratoconus to use orthokeratology.

Therefore, orthokeratology is not suitable for children with normal myopia and healthy cornea. Children with myopia should never wear orthokeratology glasses! Because it is a trivial matter for children to wear orthokeratology glasses and ruin their future (not being a soldier, etc.). ), the important thing is that they eventually destroyed their corneas, eyes and eyesight.

Five hazards of orthokeratology mirror RGP/OK mirror /MCT to cornea, eyes and vision. The summary is:

First, if you are not careful, the corneal plastic mirror will make the cornea inflamed, perforated and blind.

Second, "hypoxia". The result is "dry eye". General "dry eye" was formed in 1-2 years.

Third, the center of cornea becomes thinner; The thinning of corneal center is one of the main reasons for keratoconus (commonly known as "exophthalmos").

Fourth, corneal curvature deformation (the center of cornea is thinner and the periphery is relatively higher). The result is irregular astigmatism and irregular ghost; Irregular ghosting is not cured!

Fifth, other unpredictable eye syndrome.

In March 2004, there were tens of thousands of ophthalmologists (doctors of ophthalmology) and professors from the United States and Canada, including world-class ophthalmologists and professors from Harvard Medical School, Johns Hopkins Medical School and Yale Medical School. & lt American Ophthalmologist Association >:> (American Ophthalmologist Association) published an article entitled & gt. & lt& ltOK mirror causes children's permanent blindness >> What is the original English name?

This article is epoch-making and programmatic. Since then, no American ophthalmologist (Doctor of Ophthalmology or Doctor of Ophthalmology) has provided orthokeratology (RGP/OK glasses /MCT) for ordinary myopia patients on American soil, even in the whole world.

RGP has been hyped by some domestic enterprises, and the price of more than 8,000 yuan has discouraged ordinary families. This is all about making money without conscience.

Eye deformation is an inevitable phenomenon for nearsighted people, because most of them have long eye axes, and some of them are obviously prominent. Ordinary contact lenses are essentially different from RGP, and ordinary contact lenses are soft. Also pay attention to the wearing time should not be too long, and the cleaning should be strict to avoid eye infection.

If there is no special need, I suggest you honestly wear glasses, pay attention to protecting your eyesight and do more eye protection training. As long as you persist, the degree will not increase or even decrease, and it is not impossible to restore your vision. My Baidu space has related content, let's have a look. The key is to persist.