The danger of amblyopia is that the patient not only has low visual acuity, but also does not have perfect binocular vision function and precise stereoscopic sense. Binocular vision (binocular monocular function or binocular vision): It refers to the process of a complete stereoscopic perception in which the object image of an external object falls on the corresponding point of retina of two eyes respectively, and the visual signals from both eyes are cheaply integrated and analyzed by the visual center. In our daily life, there are many professions that require good visual and stereoscopic vision. Stereoscopic vision is a necessary function to distinguish near and far, depth, a person without perfect stereoscopic vision, even if the vision of each eye is normal, it is impossible to complete fine work. State in the admission or recruitment, vision is often used as an important criterion, some professions such as navigation, aviation, machinery manufacturing and other requirements for vision and stereo vision are very strict, if because of amblyopia and lost the right opportunity, it will be a lifelong regret.