What is amblyopia? Amblyopia is a condition in which there is no organic lesion in the eye, but functional factors are the main cause of low visual acuity below 0.9, and the corrected visual acuity is not normal; or there are organic changes and refractive abnormalities, but it is not compatible with the lesion of low visual acuity and can not be corrected is called amblyopia. Amblyopia is divided into mild amblyopia (visual acuity 0.8-0.6), moderate amblyopia (visual acuity 0.5-0.2), and severe amblyopia (visual acuity less than or equal to 0.1) by degree. Amblyopia can occur during visual development, mostly starting at the age of 1 to 2 years. The earlier the onset of amblyopia, the more severe it becomes. What is the difference between amblyopia and myopia? Amblyopia and myopia are not at all the same disease. Myopia is an eye disease caused by excessive tension in the ciliary muscle of the eye regulating muscle or genetics, which causes the eye axis to become longer, and it is not clear to see near. Amblyopia is much more harmful to the visual function of children than myopia. Because myopia is only vision loss when looking at the distance, not accompanied by other visual function damage, vision correction is not limited by age; while children with amblyopia not only low vision, can not be corrected, may not have binocular monocular function, no stereo vision, the future can not be competent driving, mapping and fine work, not only affect the future of work, but also directly affect the quality of our population.