Teenagers should wear glasses when reading. This is called reading glasses. Because reading for a long time can easily cause eye fatigue, especially in various light sources (sunlight, desk lamps, etc.), the white paper surface of a book can generate reflected light and stimulate the eyes, resulting in a sense of fatigue. Wearing these glasses will reduce the fatigue of the eyes. The same principle as the glasses used to prevent flickering on computer screens, which are now familiar to us, is to alleviate eye fatigue. The reading glasses, which in principle have no degree, are only used when reading.

Reading glasses are mainly used to protect the eyes of the human body, generally without degrees, while myopia glasses have degrees, and there are many types of myopia glasses, ranging from large to small, which can be selected based on their own myopia situation.

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

Myopia is a form of refractive error; When the eye is in a relaxed state of adjustment, parallel light enters the eye and focuses before the retina, which leads to the inability to form a clear image on the retina, known as myopia; In a relaxed state of eye regulation, when external parallel light enters the eye and its focus falls right on the retina, a clear image is formed, which is called emmetropia; If the focus cannot fall on the retina, it is called non emmetropia, which is ametropia.