Can keratoplasty completely stop the development of myopia?
The treatment of keratoconus has the disadvantage of gradual recovery of myopic refractive error after discontinuation of wear, i.e., if the normal wearer does not adhere to the wearer for a long time, the vision may fluctuate after discontinuation of wear, or even regain the vision before treatment, so we should be prepared for this feature and recommend long-term wear. The American Clinical Guidelines for Ophthalmology state that there is insufficient evidence to show that keratoplasty can stop the progression of myopia.
The safety of long-term keratoplasty wear is particularly important, as keratoplasty lenses can cause complications such as corneal hypoxia, corneal epithelial staining, corneal pigment rings, corneal distortion, glare, decreased visual quality, and even corneal pathogenic microbial infections when changing the shape of the cornea. Corneal pigment rings, corneal deformation, glare and visual quality loss can be relieved by adjusting the lenses or stop wearing them, but corneal staining and corneal microbial infections should be given enough attention to prevent the risk of vision loss, and there are reports of corneal infections occurring in young children and adolescents wearing corneal contact lenses, resulting in complications such as decreased visual function.
The indications for wearing keratoplasty lenses are normal corrected visual acuity with myopic refraction below -6.00 D and myopic astigmatism below -1.50 D;
The range of indications for keratoplasty lenses is limited, so they should be used with caution in patients with high myopia, high astigmatism, irregular corneas and pupillary abnormalities.
Contact lens wear should pay attention to standard care and reasonable use, otherwise it will cause the following hazards to the eyes.
1. Decrease in eye resistance
Aging contact lenses will make the lens oxygen permeability decline, the eyes will be similar to the human “plateau reaction” due to lack of oxygen, can not be normal metabolism, resistance to decline.
2, resulting in visual fatigue
Wearing contact lenses for long periods of time can easily lead to dry eyes. Resulting in itchy eyes, foreign body sensation, multiple eye stools, dryness, burning eyes and blurred vision.
3. Causes eye lesions
Contact lenses adsorb proteins, lipids and collagen from tears and deposit them on the surface of the lens, causing germs, corneal edema, keratitis, corneal ulcers, giant papillary conjunctivitis, corneal vascular hyperplasia, etc.
Progressive multifocal lenses do not control myopia progression
Myopia control progressive lenses for adolescents are “special” progressive multifocal lenses, and long-term use of myopia control progressive lenses for adolescents will cause a decrease in accommodation, which will reduce the magnitude of accommodation, and then cause under-adjustment as a visual function problem. Exotropia can cause exotropia if the eye is fitted with progressive lenses. Children with internal oblique myopia, lagging regulation, and over-assembly are suitable for youth myopia control progressives. According to statistics, only 10% of children are suitable, so be aware that when someone recommends them to you, you must go to the hospital for an examination before deciding on a prescription.
The later you wear myopia glasses the better, the more you wear glasses the deeper you will wear?
Children with nearsightedness should have glasses in time. Long-term absence of glasses makes the adjustment power and adjustment sensitivity decrease, making myopia develop faster. Some myopic patients would rather not be able to see things, but also do not want to wear glasses, the reason is to worry about wearing glasses after myopia will get deeper. There is no direct relationship between the development of myopia and the wearing of glasses. Myopia patients wear the right glasses, pay attention to eye hygiene, myopia will stabilize at a certain level. However, if you think that everything will be fine with glasses and you don’t pay attention to eye hygiene, you will continue to make your eyes fatigue for a long time, which will lead to vision loss and myopia deepening.
The error of computerized optometry results is mainly myopia high, astigmatism axis difference position. Therefore, the computerized optometry results can only be used for clinical reference, not directly as a prescription for glasses.
There are three reasons for the increasing number of glasses.
The first is wearing unsuitable glasses. Such glasses will not only make the prescription too large too quickly, but also produce eye fatigue. This involves the correct optometry and prescription problem, such as accurate measurement of the eye axis length, etc., otherwise it may make the glasses on the correction of vision deviation, and over time affect vision.
The second is not to pay attention to eye hygiene. If you use your eyes for too long, eye fatigue will easily occur and your vision will be significantly reduced. Nowadays, watching TV and using computer time have increased than in the past, it is best to look into the distance for about an hour with your eyes, and at the same time, you should insist on doing eye exercises, not lying down and reading crookedly.
The third pair of glasses to wear for several years. To test your eyesight at least once a year. Once you find that your eyesight is declining, you should have an optometrist and glasses in time to correct your vision. The right glasses can reduce eye fatigue and slow down the deepening of glasses.
Can’t you take off your glasses if you wear them?
People who don’t wear glasses don’t care because they have adapted to the blurred world for a long time. Myopia wear glasses, you will feel to see things much clearer, so you will be more and more accustomed to wear glasses to see things, do not want to take off glasses, myopia does not wear glasses as good as winter do not wear cotton jacket know themselves.
Can eye drops control myopia?
Myopia medication is progressing slowly, and the only thing that has been proven effective by evidence-based medicine to prevent myopia from deepening is atropine eye drop therapy. Atropine is a non-specific M receptor antagonist. It is believed that Atropine inhibits the growth of the eye axis by acting on the M receptors on the retina, thus preventing myopia from deepening, but the side effects of Atropine such as pupil dilation, photophobia, regulatory paralysis and other complications such as allergic conjunctivitis tend to occur have affected the promotion of its use. Other studies have shown that 0.05% scopolamine drops have a definite effect on relieving ciliary muscle spasm, with a short duration of action (about 6h) and few side effects. Most of the eye drops contain preservatives to prevent the deterioration of the drops. The use of eye drops for a long time will damage the function of the tear glands, resulting in the eyes not being able to secrete tears properly to protect and lubricate the eyes. Therefore, their use is limited.
Surgical treatment of myopia
Excimer laser in situ keratomileusis (LASIK for short) is the most widely used procedure. The rapid recovery of vision and the effectiveness of the procedure have led to the rapid spread of the technique worldwide. For those with high myopia beyond the range of keratoconus surgery, there is also the option of refractive IOL implantation with crystalline lens. Posterior chamber IOL implantation (I C L) has achieved a stage of research results in a multi-center clinical trial in the U.S. Posterior chamber IOL implantation with crystalline lens has better safety and effectiveness in correcting high myopia.
What does pseudomyopia mean? Can pseudomyopia be cured?
Pseudomyopia is a temporary myopia phenomenon that is fundamentally different from true myopia. In terms of performance, pseudomyopia is also blurred in the distance and clear in the near, but there is no corresponding refractive state of myopia during the dilated eye exam. It is due to the continuous tension or spasm of the eye regulation, which cannot be loosened when looking at the distance, resulting in the enhancement of the refractive power of the eye and the myopia phenomenon of seeing clearly near and not clearly far, so it is called pseudomyopia. If you can rest properly, pay attention to eye hygiene and use your eyes reasonably in a timely manner, you can recover your normal vision. If you are still nearsighted after having your pupils dilated, you have true myopia, so it is important to go to the hospital to distinguish between true and false dilated pupils.
Are dilated pupils harmful to the eyes?
In childhood, the adjustment and convergence functions are strong. If you do not dilate your pupils, you can hide some of the adjustment and affect the accuracy of your optometry. Dilated pupils are eye drops that paralyze the ciliary muscle, causing the eye to lose its regulation and facilitating special eye examinations. In essence, dilated pupils are not harmful to the eyes. When you look at something close after a dilated pupil, you cannot use regulation and appear to see near objects blurred. Once the effect of the medication is diminished, these symptoms disappear as well. Tropicamide generally returns to normal in 4 – 6 hours, and atropine dilates over a period of about 2 – 3 weeks on its own. patients under 12 years of age with myopia are required to have their pupils dilated for the first time.