People have always thought that vision loss is “quietly” coming, until the discovery of blurred vision, it is already done. In fact, in the vision loss, the occurrence of myopia is a harbinger, there are signals, here to tell you, I hope to draw attention to. Eye fatigue Some senior elementary or middle school students, reading for a long time, the handwriting will overlap serial, look up and then look at the object in front of you, there is as if, floating unstable feeling. Some people look far away for a long time and then move their vision to near objects, or look near for a long time and then move to distant objects, there will be a brief blurring phenomenon in front of the eyes. These are all signs of eye ciliary muscle dysregulation and are caused by eye strain. In addition, some children and adolescents may have recurrent chalazion, mydriasis, or blepharitis. Although these children may have a visual acuity of 1.0 or higher, they are already “playing” the prelude to myopia. Perceptual hypersensitivity Along with eye fatigue, many people also experience burning, itching, dryness, and canker sores in the eyes, and in severe cases the pain spreads deep into the orbits and even causes migraines, as well as soreness in the occiput, neck, and back of the shoulders. The whole body nerve dysfunction may cause boredom, lack of concentration, slow reaction, short temper, lack of interest in the things they used to love, and decrease in academic performance. At night, they sleep a lot, sweat a lot, are easily tired, and have symptoms such as dizziness and loss of appetite. These changes are also signs that myopia is about to occur. The above three points are called “myopia precursor syndrome” by ophthalmologists. The first thing that occurs before myopia is not vision loss, but rather neurological symptoms. Myopia is not just a problem of the eyes. Rather, it is closely related to systemic changes. It can be seen that there are signals for myopia to occur. Early detection of myopia precursors can prevent and treat myopia early.