Symptoms of myopia 1, vision loss Myopia is mainly a gradual decline in distance vision, blurred vision of distant objects, normal near vision, but high myopia is often caused by refractive interstitial clouding and retinal, choroidal degeneration, its distance and near vision are not good, sometimes accompanied by floating black shadows in front of the eyes. 2, exotropia Patients with moderate myopia or higher rarely or do not use regulation when working at close range, correspondingly weakening the effect of irradiation, which can induce the eye position to outward obliquity, forming exotropia. 3, vision fatigue Myopic patients have good adjustment power, but need to overuse the convergence force when working at close range, which destroys the balance between adjustment and irradiation, resulting in myopic vision fatigue symptoms. The symptoms are eye swelling, eye pain, headache, double shadows and false edges in vision, etc. 4. Eye protrusion Highly myopic eyes show an outward protrusion of the eyeball due to the growth of the service axis and the enlargement of the eyeball. Myopia and eye phototoxicity Normal vision, objects imaged and fall on the macula in the fundus of the eye, the light focused on high energy, the normal human body relies on the retinal macula defender DD lutein, absorbing toxic light ultraviolet, blue light, to protect the visual cells from being burned and killed. When the lutein content of the retinal macula of the eye is insufficient, it cannot absorb the toxic light of ultraviolet and blue light, and the eye, in order to protect the visual cells from being killed by the toxic light injury, will produce a stress response and try to adjust the eye backward to avoid the focus of light, thus making the object fall in front of the macula at the bottom of the eye after imaging, forming myopia. After wearing glasses, the focus of light can be adjusted so that the focus falls back on the macula of the retina and we can see objects clearly. However, if the lutein content of the eye does not change, the eye will continue to adjust backwards to protect itself and as a result myopia will increase. After a certain age, the regulation of the eye stops and without the protection of lutein, the light will permanently damage the optic cells, so that in middle and old age, various serious eye diseases occur, and even blindness Myopia and genetic relationship Myopia genetic inheritance is mainly high myopia, high myopia is also divided into two kinds of physiological, one is pathological, if it is pathological myopia, the baby’s eyes formed It is possible that myopia is inherited from a specific family, but it is not necessarily the case that all parents with high myopia will have children with high myopia, but there is a probability. Pathological myopia has a genetic component, while physiological myopia does not have a genetic component.