Abstract: therefore, if the vision of children under the age of 5 is found to have hyperopia, there is no need to worry. It doesn’t matter as long as it is within the corresponding physiological value. On the contrary, if the hyperopia reserve is consumed too early, there will be a trend of myopia.
what is hyperopia reserve?
external objects should be accurately imaged on our retina, so that we can clearly see external objects. External objects first enter the human eye through the reflection of light, and finally reach the retina after multiple refraction of various tissues of the human eye.
people are born in a hyperopia state, that is, the imaging of external objects falls behind our retina. This is because the eyeball has not grown up. With the increase of age, the eyeball gradually develops, The gradual growth of the ocular axis (the anterior and posterior diameter of the eyeball) is equivalent to the backward movement of the retina. Slowly imaging can fall on the retina and begin to reach the normal level. In medicine, this is a process of emmetropia, and the distant reserve is slowly disappearing until the emmetropia state.
Therefore, if the vision of children under the age of 5 is found to have hyperopia, there is no need to worry. It doesn’t matter as long as it is within the corresponding physiological value. On the contrary, if the hyperopia reserve is consumed too early, there will be a trend of myopia. The hyperopia reserve values of
corresponding to each age group
consume the hyperopia reserve too early, which means that the eyeball develops too fast, that is, the length of the ocular axis at this time has been greater than the normal physiological value, but before the age of 18, the development does not stop and will continue to develop. At this time, the ocular axis will be further lengthened, so myopia will occur, Academically, the degree of myopia will deepen by 300 degrees for every 1mm increase in the ocular axis, so if the eyeball develops too fast, myopia will deepen very quickly.
therefore, monitoring the development speed of children’s ocular axis and the consumption of hyperopia reserve is an effective method to detect children’s myopia tendency and prevent myopia as soon as possible. The center for prevention and control of juvenile myopia suggests that from the age of 3 to 6, a comprehensive optometric examination should be conducted once a year and a refractive development file should be established. Ophthalmic examination should be conducted regularly every year, which can discover the changes of children’s eyes in advance, predict the future development trend, and take preventive measures to protect children’s “hyperopia reserve” from being consumed, so as to effectively prevent the occurrence and development of myopia.