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目前青少年近视比例很高 ,社会各界都很关注 ,本文利用图示模型讨论环境对视力的影响 .1 视角与视敏度可看清物体细节是视觉的重要能力 .人眼的分辨能力叫视敏度 ,是用最小可分辨视角来反映的 .当人眼观察物体时 ,视觉细胞所能区分开的两个最近的点 ,与眼睛所构成的夹角就是最
At present, the proportion of young people with myopia is very high, and people from all walks of life are very concerned about it. This article uses the graphical model to discuss the impact of the environment on vision. 1 Perspective and visual acuity can be seen in the details of the object is an important visual ability. The resolving power of the human eye is called visual acuity. The degree is reflected by the minimum resolvable viewing angle. When the human eye observes an object, the two closest points that the visual cell can separate from the eye are the most