Health reminder: children should prevent and treat myopia, which is well known to all, but there are still some misunderstandings in the prevention and treatment of hyperopia. Some people think that 'hyperopia is better than myopia, hyperopia is better to see far','wearing glasses is a matter of myopia ', and so on. In fact, these statements are not correct.
Hyperopia:
The so-called hyperopia is that after the reflection of the external scene enters the intraocular refractive system, the focus falls behind the retina, so it can't be clearly imaged on the retina, and the distance and near view are not clear. Many medium and high hyperopia eyes not only have poor vision, but also have strabismus and amblyopia. Therefore, ophthalmologists believe that hyperopia is more troublesome than myopia ametropia eye disease, can not be ignored.
In addition to affecting far and near vision, hyperopia also causes muscle fatigue, eye soreness, orbital pain and dizziness due to the long-term excessive contraction of one of the regulating muscles, the medial rectus muscle. Children will appear in class concentration, poor memory, hate reading and writing, so the decline in academic performance.
In hyperopia, the enhancement of accommodation will increase the excitability of the medial rectus muscle. If the hyperopia degree of one eye is serious, in order to make the eye see the scenery clearly, it is necessary to increase the regulation, and the excitability of the medial rectus muscle must be increased than that of the normal eye. Therefore, most strabismus appeared in children with high hyperopia. Most of the patients with anisometropia and strabismus are used to working and learning with fixation eye (lower hyperopia), but the strabismus eyes that are not used are put aside. After a long time, strabismus will become amblyopia.
Children with hyperopia should have optometry and glasses as soon as possible. If parents find that their children don't like reading, they will feel fuzzy, bloated eyes, headache and poor academic performance if they read for a long time. They must go to the doctor in time for examination and retinoscopy. If it is confirmed as hyperopia (including hyperopia astigmatism), it is necessary to seize the golden opportunity before the age of 8, wear appropriate glasses, and do not delay. Otherwise, after the age of 12, it will be very difficult to improve vision, let alone restore binocular vision function.
Before children's hyperopia glasses, we must first dilate the pupil with cycloplegic agent before optometry.
The principle of matching glasses is as follows:
(1) Low hyperopia
That is to say, preschool children below 300 degrees with normal or near normal vision and without visual fatigue symptoms may not wear glasses temporarily. Because many children have 300 degrees of physiological hyperopia. Those with symptoms of visual fatigue should wear glasses if they can improve their vision after wearing them. However, it may not be enough, and can be kept at 50-100 degrees.
(2) Medium and high hyperopia
In other words, if the children are above 300 degrees, their near and far visual acuity are decreased to varying degrees. Most of them have visual fatigue symptoms, and can be equipped with glasses in stages. First, wear hyperopia glasses which are slightly lower than the diopter obtained by refraction, and then give the prescription of all hyperopia degrees according to the refraction results after adaptation, and wear the second pair of glasses.
(3) In principle, hyperopia should be provided for patients with intraocular inclination
In particular, the patients with complete correction or basic correction of esotropia after wearing glasses, and obtain binocular single vision function, even if the vision is reduced after wearing glasses, they should be matched according to the doctor's advice. If the eye position does not change after wearing the glasses, and the vision drops obviously, the blackboard can not be seen clearly in class, and it is difficult to walk, the glasses with a lower degree can be properly worn at the beginning, and the glasses can be re equipped to give sufficient degree after adaptation.
Under normal circumstances, the first time wearing glasses will always be a little uncomfortable, generally wear more than two months will adapt. Wear glasses after adaptation to adhere to the regular wear do not take off, and often check the visual acuity. For those with amblyopia, the healthy eyes should be covered and the affected eyes should be trained to make the patients' vision return to normal.