Abstract: when looking at distant objects, the ciliary muscles relax and the shape of the lens is flat; When the eye looks at the near object, the ciliary muscle contracts to increase the convexity of the lens to deepen its diopter., Normal eyes can see both near and far objects as clearly, because the eyes have regulating function., The lens and ciliary trace in the eye are mainly responsible for regulation. The eye is like a camera, the retina at the back of the eye is like a negative film, the lens is equivalent to a lens, and the ciliary muscle regulates the lens., When looking at distant objects, the ciliary muscles relax and the shape of the lens is flat; When the eye looks at the near object, the ciliary muscle contracts to increase the convexity of the lens to deepen its diopter., The closer you look, the more severe the ciliary muscle contraction; If the time is too long, it is easy to cause ciliary muscle fatigue and affect the recovery of its normal function., Early myopia is due to ciliary muscle fatigue and spasm, and the lens cannot restore its flat shape, so it is not clear to see far objects. At this time, the object image falls behind the retina., This kind of myopia is called “pseudomyopia”., If the eyes are excessively tired for a long time and the lens cannot return to its original state, the eyeball will also change, and the anterior and posterior diameter of the eyeball will gradually become longer, which will really become myopia.,
normal eyes can see both near and far objects as clearly, because the eyes have regulating function.
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are mainly responsible for regulating the lens and ciliary trace in the eye. The eye is like a camera, the retina at the back of the eye is like a negative film, the lens is equivalent to a lens, and the ciliary muscle regulates the lens.
when looking at distant objects, the ciliary muscles relax and the shape of the lens is flat; When the eye looks at the near object, the ciliary muscle contracts to increase the convexity of the lens to deepen its diopter.
the closer you look at the object, the more severe the ciliary muscle contraction; If the time is too long, it is easy to cause ciliary muscle fatigue and affect the recovery of its normal function. The early myopia of
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is only due to ciliary muscle fatigue and spasm, and the lens can not restore the flat shape, so it is not clear to see the distant object. At this time, the object image falls behind the retina.
this kind of myopia is called “pseudomyopia”.
if the eyes are excessively tired for a long time, the lens cannot return to its original state, the eyeball will also change, and the anterior and posterior diameter of the eyeball will gradually become longer, which will really become myopia.