Abstract: preschool children do more distance learning and outdoor activities in the sun, which helps to delay the growth of ocular axis, that is, it can protect ‘hyperopia reserve’, so as to avoid myopia. But once children have myopia, the effect of outdoor activities is very weak, and it is difficult to reverse or even delay it. The
survey found that 6-year-old children also have + 1.5D hyperopia on average. Whether this average value is sufficient remains to be comprehensively analyzed and compared with the data of 6 years. Children play with mobile phones and tablets too much. When these bad eye habits cause rapid eye development, they will consume children’s hyperopia reserves. Once the hyperopia reserves are consumed in advance, myopia will appear.
for example, 4-5-year-old children have a physiological diopter of 200-250 degrees hyperopia, that is, they have a hyperopia reserve value of 200-250 degrees. If the child’s hyperopia reserve value is much different from 200 degrees, such as only 50 degrees, it means that the child is likely to get myopia in primary school.
it is too late for parents to know their children’s visual acuity only by “feeling”, or to pay attention to their children’s visual acuity until they are nearsighted. Parents should pay attention to correcting their children’s bad eye habits, such as long-term close eye use, crooked head writing and reading, too close reading and watching TV, etc. they should take their children to the regular hospital for eye optometry examination as soon as possible, understand the children’s hyperopia reserves, track and file their children’s vision as soon as possible, and achieve “early detection and early intervention”.
high myopia is prone to various fundus lesions and even blindness. Preschool children of
do more distance learning and outdoor activities in the sun, which helps to delay the growth of ocular axis, that is, they can protect the “hyperopia reserve”, so as to avoid myopia. But once children have myopia, the effect of outdoor activities is very weak, and it is difficult to reverse or even delay it. The aging of myopia is not as simple as “wearing more glasses”. With the prolongation of the course of myopia caused by the younger age, The distribution of myopia will gradually evolve to high myopia (generally more than 600 degrees of myopia), which is easy to produce various fundus diseases and cause serious permanent visual function damage, such as retinal hole, retinal detachment, glaucoma, cataract, macular hemorrhage and degeneration, which have become new important blinding eye diseases.
The traditional optometry items can only show the low-order aberrations of the eyes, such as myopia, hyperopia and regular astigmatism. The high-order aberrations are composed of irregular astigmatism, spherical aberration and coma. These aberrations will lead to the decline of visual quality. General glasses can only correct ametropia caused by low-order aberrations, but can not correct high-order aberrations at the same time, so it is difficult to obtain the same visual acuity as normal eyes. Therefore, myopia is not simply to wear one more pair of glasses.