What is medical refraction?
The definition of medical refraction is: on the basis of correct optometry, correct prescription is made for medical purposes. Its main contents: 1. check the dominant eye, 2. check the eye position, 3. check the adjustment power, 4. check the refraction, 5. balance the adjustment of both eyes.
What is myopia in children?
Myopia in children is also known as adolescent myopia and developmental myopia. There are two main reasons for the occurrence and development of myopia: 1) the sudden increase in school workload after children enter school, mainly due to the increased use of eyes at close range, resulting in eye fatigue, eye enlargement and myopia deepening; 2) children’s physical development into adolescence, along with physical development, eye enlargement and myopia deepening.
What is pseudomyopia?
Pseudomyopia is a functional change with symptoms similar to myopia, but without organic myopia changes. When the eye is used excessively at close range, such as when reading for long periods of time, watching TV continuously, or operating a computer, the ciliary muscles in the eye, which are responsible for regulation, continue to contract, resulting in a spasm of regulation, creating a state of pseudomyopia. If the refraction is within ±0.50D after pupil dilatation, we call this “pseudomyopia”.
Why do children need a dilated eye exam for myopia?
The best way to distinguish between true and false myopia is through pupillometry, which is performed when the eye is at rest in order to relax the adjustment and get an accurate prescription for children under the age of 15.
Is it better to wear myopia glasses for a long time? Or is it better not to wear them?
The brain and eyes suffer the most from not wearing glasses. Because myopic eyes do not wear glasses, distant objects cannot be clearly focused on the retina of the eye, and the retina cannot be stimulated with a clear image, so the brain does not receive the corresponding information, which is important for the development of the brain and thus is not conducive to eye development. Wearing glasses during class and indoor activities with myopia within 200 degrees can be avoided, but those with more than 200 degrees should wear them.
Is it better to wear a full degree of myopia or a lower degree of myopia?
The principle of myopia prescription is to obtain the lowest degree of best corrected vision, but this does not mean that the lower or higher the degree is the better, too low a degree still sees a blurred image, but more likely to promote the development of myopia; too high a degree increases the regulation, also causing visual fatigue, leading to further development of myopia.
Will myopia get deeper as I wear them?
For the various means of eye care on the market now, such as eye massage, eye patches, student progressive lenses, the E mirror, etc., these methods are all only auxiliary role. The only way to stop myopia from deepening is to wear glasses for true myopia. But if you think that with glasses everything is fine, usually do not pay attention to eye hygiene, will still lead to vision loss, myopia deepening. In addition, some highly myopic patients, although insist on wearing glasses, but the degree will still deepen, and accompanied by fundus lesions, medically known as pathological myopia. This kind of myopia deepening is not related to wearing glasses, but has some relationship with heredity.
Can progressive multifocal student lenses stop myopia progression?
The COMAT program, implemented on January 1, 1997, clearly states that progressive multifocal student lenses are only effective for moderated internal myopia, but not for the rest, and may even accelerate the progression of myopia in those with moderated external myopia.
Can E lens (myopia regression lens) really treat myopia?
The E lens (myopia regression lens) is a combination of prism and lens in a pair of glasses, the refractive effect of the prism and the concentrating effect of the lens, breaking the normal binocular fusion function of the child in the near-eye work, so that both eyes are in a far-seeing state.
On February 23, 2009, the State Drug Administration exposed the medical device advertising slogans such as “ten myopia, nine can be good” and “revolutionary breakthrough in the eyeglass industry” for the illegal release of the Eighth Mirror (myopia regression mirror). The advertisement contained a large number of unscientific assertions and guarantees indicating efficacy, and used the names of patients and experts as proof of product efficacy, seriously deceiving and misleading consumers.
How to prevent myopia?
1. Understand the refractive state of the eye (dilated pupil examination) before school age so as to grasp the direction of refractive development and treat it separately.
2. Pay attention to three risk factors: risk age – growth and development period; risk moment – dusk in the afternoon; risk work – prolonged near eye use.
3, reduce the impact of hazy image on vision, wear appropriate glasses.
4.Relax the adjustment, often look away.
5.Right reading and writing posture.
6.Reasonable nutrition, not partial food, strengthen exercise, etc.