1.What is myopia?
Nearsightedness refers to the state of myopia where the refractive system bends parallel light rays from external objects and the focal point falls in front of the retina, forming a diffuse ring on the retina and causing blurred vision.
2. How does myopia occur?
It is generally believed that congenital myopia (high myopia) is influenced by hereditary or embryonic factors that cause the eye axis to grow too fast and too much, and that the eye axis is continuously lengthened from the embryonic period to after birth and even after the body matures, accompanied by pathological changes of the eye.
Acquired myopia is mainly related to excessive near eye use. When looking at near objects, the adjustment force of the eye increases, and often over-adjustment for a long time can form an adjustment spasm, regardless of looking near and far, the refractive power of the lens is always too strong, that is, the formation of regulatory myopia, and further development becomes myopia.
3, what are the bad eye habits that cause myopia?
(1) Continuous use of the eyes for too long
(2) Using the eyes too close to each other
(3) Poor eye environment
(4) Improper method of watching TV
4.Myopia glasses should pay attention to what problems?
(1) Exclude pseudomyopia: the most reliable method is to dilate the pupil for optometry.
(2) Avoid over prescription: choose the lowest prescription lens with the best corrected vision after optometry and re-testing.
(3)The glasses should be fitted correctly
5.Will wearing glasses make myopia deepen?
There are many people who have deep doubts about wearing glasses, thinking that myopia will get deeper and deeper after wearing glasses and will never be taken off again. Therefore, some myopic patients would rather have a blur in front of their eyes and live in a hazy state all day long than easily wear glasses. This is actually a misconception. The reason for this misunderstanding is often because the prescription glasses exceed the actual degree of myopia, on the basis of the original myopia and added to the false myopia part; may also be due to the habit of wearing glasses after seeing things clearly, once the glasses are removed, the vision is blurred, so the vision is not as good as before. In fact, myopic refraction does not change due to wearing glasses, that is, wearing glasses does not change the length of the eye axis. In fact, wearing the right glasses regularly can help slow the progression of myopia. So, why do some people’s myopia actually deepen after wearing glasses? This is a result of the development of the eye itself, and is also closely related to not paying attention to reasonable eye use. Therefore, even if myopia deepens again after wearing glasses, it can not be attributed to the results of wearing glasses.
6, after the glasses are good to wear often or wear when not wear good?
Myopia within 300 degrees without amblyopia can be worn in the state of far-sightedness, such as classes, watching TV, etc., in close reading and writing and sports can not wear glasses; if in more than 300 degrees should be worn often. If the difference between the two eyes is large, you should also wear them regularly. If you are farsighted, astigmatism, whether it is light, medium or high should be worn often, so as to reduce the discomfort symptoms brought about by the adjustment.
7. Why can’t I wear corneal contact lenses overnight?
Wearing corneal contact lenses overnight can lead to corneal hypoxia, while the conjunctival capsule of the tangible substances easily deposited in contact lenses affect the use of corneal contact lenses; resulting in corneal peripheral neovascularization, corneal edema, epithelial cell damage, etc., while easily causing inflammation. So you can’t wear corneal contact lenses overnight.
8.Can myopia be cured?
The treatment effect of myopia varies depending on the type of myopia. Pseudomyopia can be cured by relaxing the adjustment method; mixed myopia can be improved by the above methods; and the most effective treatment for true myopia is to correct it with glasses, and some myopia can be cured by surgery.
9.What drugs can treat myopia?
Nowadays, the more commonly used clinical medicine is Shuangxingming (0.25% compound tropicamide) eye water, which is a short-acting ciliary muscle paralyzing agent, and it can be used once a night before bedtime, and the pupil will recover in the next morning. To a certain extent, it can release the ciliary muscle spasm, which is effective for pseudomyopia or mixed myopia with regulatory factors. In Chinese medicine, there is magnetic bead pressure on ear acupuncture points to relieve eye fatigue through the stimulation of acupuncture points, which is very effective for pseudomyopia and mild myopia below -2.00 degrees, and also for moderate myopia.
10.What are the main types of surgery for myopia?
There are many surgical methods to treat myopia, of which corneal surgery is the most performed. The most commonly used surgical methods are excimer laser in situ keratomileusis (LASIK), which uses a high-precision electric cutting knife to cut a small corneal flap, lift it off, cut the corneal stroma with an excimer laser, and finally reset the flap to correct myopia and astigmatism. It is the most popular, safe and reliable refractive surgery for different degrees of myopia. In addition, for thin corneas and high myopia, BSL, LASEK, ICL and other surgical methods can be used to achieve individualized treatment of myopia.
11.Is laser treatment for refractive error safe? What are the side effects?
Laser treatment of refractive error has been proven to be a very safe and effective surgical method. Generally speaking, there are few side effects as long as the indications for surgery are well mastered.
12.Does laser refractive eye surgery have long-lasting effects?
You can open your eyes immediately after the surgery, recover your vision in a few hours, and go to school and work the next day. After nearly 20 years of clinical observation, the success rate of myopia surgery is generally above 95%. If you use your eyes reasonably after surgery, the treatment effect is long-lasting.
13.To what extent can vision be restored after surgery?
After surgery, the naked eye vision can generally reach the best corrected vision before surgery with glasses, but for highly myopic patients, it may not reach the best corrected vision before surgery.
14.Who is suitable for surgery?
①Patients who do not wear glasses and want to improve their visual acuity;
②Age 18 years old or above;
③The refractive error is stable for more than 1~2 years;
④No surgical prohibition.
15.Who is not suitable for surgery?
①Acute inflammatory eye diseases such as conjunctivitis, keratitis and dacryocystitis;
②Patients with retinal detachment and other fundus pathologies;
③Patients with severe dry eye, glaucoma, diabetes, collagen disease and keloid;
④Patients with cone cornea;
⑤ Pregnant and lactating women;
⑥Patients with severe amblyopia whose vision is very poor with lens correction.