Presbyopia and myopia cannot be canceled out, they are two different refractive states. Myopia is caused by the refractive power of the eye exceeding the normal range or the elongation of the eye axis, resulting in a loss of distance vision, which is usually manifested as blurring of things in the distance, and can be corrected by concave lenses for myopic patients. Presbyopia is a degenerative disease, due to the decline in the elasticity of the lens of the eye, thus causing the ciliary muscle regulation ability also declined, resulting in the dispersion of light can not be gathered in the retina, so there will be a decline in near vision, generally manifested as a close reading is more difficult to read, like to put the target of the reading farther away in order to see clearly, patients with presbyopia can be corrected by convex lenses. It is recommended that we usually develop good eye habits, less look at electronic products, and do not use eyes in close proximity to avoid excessive fatigue.