What are reading glasses? What are their functions?

Reading glasses are very helpful to prevent and control myopia when used well. Reading glasses are mainly used to protect human eyes, and generally have no degree.

The triangular prism adjusts the convergence, so that the image of the object moves from the base to the top of the base, and the bottom is inward, so that it is easy to see close as far as possible, preventing the true myopia caused by excessive collection.

The convex lens can be relaxed and adjusted. When looking close, the convex lens can replace the lens to keep the eyes relaxed and prevent pseudomyopia caused by over-adjustment.

Fog vision eliminates fatigue, and convex lens can see far fog vision, which can force the lens to return to flat, eliminate the phenomenon of excessive adjustment, and keep the eyes in a relaxed state.

Eliminate false and prevent true eye care, eliminate false myopia, and control true myopia to achieve a real combination of myopia prevention and treatment.

Generally speaking, it is best to pay attention to keeping the distance between the eyes and the book or desk at the correct reading distance of more than 30 cm to prevent reading in a dark environment, so as to prevent myopia.

Myopia is a kind of refractive error. When the eye is in a relaxed state, the external parallel light enters the eye and its focus falls on the retina, forming a clear image, which is called emmetropia; If the focus cannot fall on the retina, it is called non-emmetropia, which is ametropia.