The difference between presbyopia and myopia lies in the generation principle, clinical manifestations, correction methods, and common population, as follows: 1. The generation principle is different: myopia is parallel light entering the eye, refracting through the refractive system of the eye and converging on the retina before. Presbyopia is due to a decrease in the elasticity of the lens and the adjustment ability of the ciliary muscle, after the dispersal of light can not converge on the retina, but converge on the retina after; 2, the clinical performance is different: myopia is mainly manifested as looking at the distance is not clear, looking at the near place is clear; presbyopia is mainly manifested as looking at the distance is clear, looking at the near place is not clear; 3, the correction method is different: myopia mainly relies on wearing concave lenses to correct, presbyopia mainly Different correction methods: myopia mainly relies on wearing concave lenses for correction, while presbyopia mainly relies on wearing convex lenses for correction; 4.