Myopia and presbyopia do not cancel each other out; they are two different refractive states that can co-exist. Myopia is an abnormality in the refractive power of the eyes caused by irrational eye habits, resulting in a decrease in distance vision and blurriness when looking at a distance, but near vision is still normal. Presbyopia is generally due to the hardness of the lens hardness caused by the weakening of the elasticity, the eyes of the adjusting ability to decline caused by a degenerative disease, so it will be manifested as a decline in near vision, there are symptoms of close reading difficulties. Myopia and presbyopia are two different diseases that do not cancel each other out. If both myopia and presbyopia exist at the same time, you can take the method of wearing myopia glasses to improve distance vision and presbyopia glasses to improve near vision to relieve. If both myopia and presbyopia exist at the same time, go to the hospital in time for examination and standardized correction under the guidance of the doctor.