Although farsightedness and presbyopia are corrected with convex lenses, they differ in three ways, as follows: 1. The causes are different: farsightedness is due to the eye axis being too small, or the bending ability of the lens in the eye is not enough, making the focus fall on the back of the retina. The cause of presbyopia is due to the decrease in the elasticity of the lens as it ages, and the regulating ability of the lens decreases. In other words, the focusing ability of the lens of the camera has decreased, so when looking at near objects, it is not possible to see very clearly. 2. Clinical performance is different: farsightedness is mainly manifested by the lack of clarity when looking at far and near, and the visual acuity when looking at far and near is not normal after pupil dilatation, especially the visual acuity when looking at near is worse. In the case of presbyopia, if the original refractive error is ruled out, only when looking at the near, only when reading, reading books, reading newspapers, or sewing things appear vision or visual impairment; 3, the treatment is not the same: farsightedness in general, if you enter the moderate farsightedness, young people, if the adjustment ability is not very good, all day advocate wearing glasses, and presbyopia, if there is no refractive error, only when looking at the near need to wear presbyopic glasses.