Let's first understand the concept of diopter. The degree of myopia in people's mouth is closely related to diopter. 1 diopter is defined as the focal point one meter after the light passes through the lens. The formula D= 1/f is represented by d, and f is the focal length. Distance If the focal length of a lens is 0.5 meters, then the diopter of this lens is 1/0.5=2, which is traditionally called 200 degrees.
Many friends want to find out the relationship between vision and diopter (myopia) on the eye chart. In fact, these two concepts are independent of each other, and there is no absolutely accurate conversion relationship between them.
Generally speaking, people with ametropia have poor eyesight. The higher the refractive power, the lower the naked eye vision. But this is not absolute. Some people have low diopter, but poor eyesight, because diopter is not the only factor that affects eyesight. If the eyes have other diseases or retinal imaging function, impaired optic nerve function, etc. , but also reduce vision.
I wish you all a world of discerning people!