Nearsightedness does not affect blood donation. Myopia is a localized disease of the eye, which only affects the eye, but has no effect on the whole body, and does not affect participation in blood donation. Myopia is the result of increased refractive power of the eyes, which leads to a decrease in distance vision and therefore blurred vision of distant objects. As myopia deepens, in addition to the loss of distance vision, various complications may gradually appear. When the degree of myopia exceeds 600 degrees, there will be highly myopic fundus lesions, such as vitreous clouding and liquefaction, retinal and choroidal atrophic changes, optic disc atrophy arc, macular hemorrhage, macular splitting, and even retinal fissure or retinal detachment in serious cases, all of which will have a very serious impact on vision. Therefore, people with high myopia need to pay attention to avoid strenuous exercise in their daily life to prevent serious complications.