Myopia glasses are glasses that are used to correct vision and allow people to see distant objects clearly. The purpose is to enable the ciliary muscles of the eyeball to maintain a certain degree of adjustment. Myopia glasses have a certain preventive effect on complications caused by high myopia, such as retinal detachment, vitreous opacity, cataracts, glaucoma, nystagmus, etc. Myopia glasses are concave lenses. [1] The image formed by a concave lens is always smaller than the upright virtual image of the object. Concave lenses are mainly used to correct myopia. Glasses power: The refractive power of glasses is generally expressed in degrees. One dioptre is equivalent to 100 degrees as generally known to people or opticians, which is D 1.00 in non-Chinese countries (here D is Dioptre rather than "degree"). The more serious the vision problem, the deeper the lens power required and the thicker the lens.
