Amblyopia concept Amblyopia is defined as the absence of obvious organic pathology in the eye, with distance visual acuity below 0.9 in one or both eyes (below 1.0 in children over five years old) and uncorrectable. The latest view is that amblyopia is the result of insufficient effective stimulation of visual cells during visual development for various reasons, resulting in lower corrected visual acuity than normal children of the same age, with no ocular pathology affecting visual acuity (no organic pathology) seen on general ophthalmologic examination. At birth, the visual function is relatively weak and gradually develops into normal vision through appropriate visual stimulation. Amblyopia will likely occur if, during visual development, visual cells cannot be adequately stimulated due to strabismus, refractive errors (high hyperopia, astigmatism, myopia), congenital cataracts, etc., and visual development is affected. Amblyopia is commonly referred to as weak vision, which refers to vision with glasses, not naked eye vision (vision without glasses). For example, we all know that myopia can’t see without glasses, but when you put on the right glasses, your vision can reach 1.0. This situation can’t be called amblyopia because your vision with glasses can reach normal 1.0 vision. In the case of amblyopia, even with the right number of glasses, the vision still does not reach normal. Why can a person with normal vision development achieve normal 1.0 vision with glasses even though his naked eye vision is poor, but not with amblyopia? Because amblyopia is a functional disorder of the eye with developmental defects. When it comes to the word “function”, we all think of the following two points: First, there are strong and weak functions, vision function is also the same, vision function strong people can see 1.5 or even 2.0; Second, the function can be gradually enhanced through exercise, such as weightlifting athletes through a long period of time after the exercise, muscle function is stronger, can Lift several hundred pounds of objects. Then vision is the same, but also through the use of glasses, a “special tool” to make up for the lack of vision stunted before, so that the function of vision can be gradually enhanced, to finally reach or exceed normal vision.