Myopic eye wear glasses will also appear vision loss, mainly for the following reasons: 1, true and false myopia failure to distinguish: due to excessive eye fatigue caused by pseudomyopia does not need to wear glasses, pseudomyopia wear myopic lenses will induce true myopia; 2, the degree of optometry is not accurate: such as wearing a higher or lower degree of myopia than the actual refractive error, professionally known as overcorrection or undercorrection, will certainly make myopia deepen, so it is recommended Patients should not borrow other people’s glasses at will, even if the myopia is the same, due to differences in face shape, there will also be differences in pupil distance, wearing glasses with inappropriate pupil distance will also cause visual fatigue, leading to myopia progression; 3, do not pay attention to eye hygiene: time will lead to an increase in myopia; 4, the quality of glasses is not qualified: wearing worn or defaced lenses will lead to myopia progression; 5, eye diseases: such as adolescents High incidence of acute keratitis, acute uveitis, acute optic neuritis, can cause a sharp decline in vision, if not to the ophthalmology further examination will be mistaken for myopia deepening.