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Myopia
Can high myopia with bulging eyes be corrected?
High myopia with bulging eyes is caused by the elongation of the eye axis, which is irreversible. Myopia is when parallel light rays entering the eye are focused in front of the retina, after passing through the eye's refractive system, and thus cannot form a clear image on the retina. Myopia can be classified into low, moderate, and high degrees, with high myopia defined as 600 degrees or more. Once myopia progresses to true myopia, it is incurable, and one can only correct or control its progression. Before the age of 18, myopia can only be corrected and controlled by wearing frame glasses or orthokeratology lenses; after the age of 18, elective surgeries like myopic correction surgery or artificial lens implantation are also available options for correcting myopia.
Can a child's 150-degree myopia be reversed?
Whether myopia of 150 degrees in children can be reversed depends on whether it is true myopia or pseudo-myopia. However, clinically, the vast majority of cases of 150-degree myopia are true myopia, so the chances of recovery are very small. Pseudo-myopia can be reversed through certain methods, such as protecting eyesight in daily life, developing scientific and reasonable eye habits, and regularly performing eye exercises. After a period, it is possible for the vision to return to normal. However, once true myopia occurs, current medical methods are unable to restore a child's vision to normal. Vision can only be corrected through methods such as wearing glasses, enabling the child's vision to reach a normal level. However, once glasses are removed, the child's vision remains myopic.
Can children's myopia be corrected?
Myopia in children can be corrected, but this correction simply brings the child's vision to a normal level and does not mean that true myopia can be reversed. Myopia can be divided into true myopia and false myopia. False myopia can be restored to normal vision through appropriate rest and a series of relieving recoveries. However, if diagnosed with true myopia, there is currently no method available to reduce the degree of myopia and restore the child's normal vision. Moreover, once true myopia occurs, it will not stop and typically increases every year until the child reaches adulthood, when it gradually stops. Therefore, before the child reaches adulthood, it is worth considering using methods such as wearing glasses and developing good eye habits to control the increase in the child's degree of myopia and to achieve the purpose of correcting the child's vision.
Is it good to apply heat to the eyes every day for myopia?
Applying heat to the eyes every day cannot control myopia, but it can slightly relieve eye fatigue, dryness, and other discomforts. Myopia occurs when parallel rays of light enter the eye and focus in front of the retina through the eye's refractive system, failing to form a clear image on the retina. If myopia is pseudomyopia, it might recover through rest, relaxation, and pupil dilation. However, if it progresses to true myopia, it becomes irreversible and incurable; vision can only be corrected and its progression controlled. Before the age of 18, myopia can be corrected with glasses or orthokeratology lenses. After turning 18, corrective surgery for myopia might be an option. It is advised that adolescents and children actively control the progression of myopia.
What is the uncorrected visual acuity of high myopia?
Myopia can be classified as mild myopia from 200-400 degrees, moderate myopia from 400-600 degrees, and high myopia as above 600 degrees. What is the uncorrected visual acuity for high myopia? There is no clear pattern for this because a visual acuity of 0.1 may be corrected to 1.0 with just 50 degrees, or it might not reach 0.5 even with 1000 degrees. Therefore, uncorrected visual acuity is not a standard measure for high myopia. The level of uncorrected visual acuity depends on the condition of the eye's axial length and diopter. If the change in the axial length is not significant, a minor uncorrected visual acuity is not crucial, and the required correction might be very low. Conversely, the longer the axial length, the higher the correction needed might be.
Can eye fatigue lead to nearsightedness?
Myopia is characterized by clear vision up close but blurry vision at a distance, primarily caused by changes in the eye's axial length. Several factors contribute to the development of myopia: first, hereditary factors; second, inappropriate use of eyes, such as prolonged usage leading to eye fatigue, which can worsen the degree of myopia. Typically, the development of myopia occurs under the age of 20. After 20, there shouldn't be further development; if there is, it is referred to as pathological myopia. Therefore, it is important for patients with myopia or eye fatigue to use their eyes correctly, reduce close-up activities to avoid eye strain, and have regular check-ups to monitor their vision.
What should we do if a child has severe myopia of 800 degrees?
Myopia can be divided into pseudomyopia and true myopia, with true myopia further categorized into low, moderate, and high degrees. Clinically, myopia exceeding 600 degrees is usually referred to as high myopia. High myopia not only causes blurred vision in children but can also lead to various eye diseases, such as retinal detachment. Thus, it is very serious. Moreover, once children develop high myopia, their vision might continue to deteriorate even into adulthood. Therefore, parents must pay significant attention. During childhood, methods such as wearing glasses can be used to control the progression of myopia. If the child has reached adulthood and their eyesight has not continued to worsen over two years, considering treatment options like surgery might be possible, though currently, it is incurable.
Is a child's vision of 4.7 considered nearsighted?
Children's vision at 4.7 does require a comprehensive analysis to determine if they are nearsighted. Generally, a child with a vision of 4.7 is likely to be nearsighted, but this single parameter should not be used to diagnose myopia. It's necessary to differentiate whether the child has true myopia or false myopia. Additionally, the issue could be amblyopia, astigmatism, or farsightedness. Moreover, the child's age also plays a significant role in assessing vision. For instance, a vision of 4.7 might indicate nearsightedness in a child aged seven or eight, but for a child around three years old, a vision of 4.7 is considered normal. Parents are advised to take their child to the hospital for a dilated refraction test to ascertain the specific condition.
Why can't true myopia be reversed?
True myopia is mainly characterized by the elongation of the eyeball, and the current medical level cannot solve the problem of eyeball elongation. Therefore, its nature cannot be changed, which means it cannot be reversed. Present treatment methods can only alleviate the symptoms of blurred vision when viewing distant objects in myopic patients, but cannot resolve the fundamental nature of myopia. Current treatment options include prescription glasses, orthokeratology lenses, contact lenses, and surgical treatments. Surgical options include corneal laser surgery and ICL (implantable collamer lens) surgery. After the onset of myopia, it is important to rest and use the eyes correctly to prevent further progression of the condition.
Is 1000-degree acquired myopia hereditary?
High myopia of 1000 degrees can also be inherited. The inheritance of myopia is mainly significant in cases of high myopia. If both parents have high myopia, the heritability is almost above 90%. If one parent has high myopia, the heritability is 45%. If neither parent is myopic, the heritability is nearly 5%. Myopia is primarily formed due to improper use of eyes rather than hereditary factors, which are relatively rare and generally only account for about 10% of myopia cases. Therefore, correct use of eyes is very important.