In the face of the increasing popularity, ageing and heightening of myopia in young people, prevention of myopia has gradually become a hot issue, and the most important factor in myopia is excessive use of the eye.
"Easy to use the eye" has been proposed by the ophthalmology community in recent years, because the eye is close to a limited "resource". Infinite squandering will lead to the habitualization of the eye to close range. From an evolutionary point of view, It will gradually degenerate the inherent ability of human beings to look far.
Long-term computer operation, reading, watching TV, playing game consoles, etc., are too long. For children in the growth stage, it is easy to cause visual fatigue, which causes the ciliary muscles to "take vacation". Forming "pseudo-myopia", even causing fundus lesions, the axial length is elongated.
We all know that the development of human vision is gradually developed by far vision. At 6 years old, it is about +1.50D (equivalent to 150 degrees for farsightedness) and gradually develops in the direction of 0D. This process is called (Albe optics). For the process of vision vision, however, there are very few people with standard 0D, more continue to develop towards near vision, and finally form myopia.
Of course, vision itself is a dynamic process, because the eye itself has self-regulating ability. The ciliary muscles on both sides of the lens have the effect of regulating the focus. However, the long-term use of the eye will cause the ciliary muscle to continue to contract and linger. The result is that the ciliary muscle loses its regulating power, the anterior and posterior diameter of the eyeball grows, the axis of the eye is elongated, and finally myopia is formed.
Therefore, saving eye is the root of preventing myopia. Only by leaving a "deposit" for the future of the eye, can the eye have enough far vision to offset, so that the eye can remain in the interval of emmetropia without forming myopia.