Vision refers to the ability of retina to distinguish images. Visual acuity is judged by the ability of retina to distinguish images. However, when the refractive medium of the eye (such as cornea, lens, vitreous body, etc.). ) become turbid or have refractive errors (including myopia, hyperopia, astigmatism, etc.). ), the visual acuity of eyes with good retinal function will still decline. Opacity of refractive medium can be treated by surgery, and ametropia needs to be corrected by lens.

The principle is as follows: Fine movements require more energy consumption and attention distribution than extensive movements. In the case mentioned by the subject, it is necessary to focus the eye muscles more accurately to reduce the influence of virtual shadow caused by inaccurate focus on font recognition. ? Moreover, we know that the resolution and stroke of any mechanical structure are good friends who undermine each other and have high standards. Another criterion is reduction. When the system is required to make actions close to the resolution limit, more components are needed to coordinate and fight to achieve a delicate balance. For the eyeball, this kind of hard work will make the eye muscles excessively tense and tired.

The human eye, like other organs, is harmless within a moderate range of activities. The essence of exercise is to enhance the function under reversible conditions, otherwise it cannot be called exercise, but injury. There are many factors that affect vision, including the nutritional supply of eye muscles and nerves, and also related to the health of the whole human body, commonly known as spirit. Therefore, it is difficult to improve eyesight only by reading small fonts, but it is easy to be damaged by fatigue. The suggestion is not to use your eyes, but to do more fitness activities.