The deepening of myopia in a short period of time may be related to overuse of eyes, wearing inappropriate glasses, glaucoma, etc. 1. Excessive eye use: staring at the computer or cell phone for a long time, which will lead to eye fatigue, the ciliary muscle lens of the eyes to reduce the ability to regulate, which leads to myopia deepening. 2. Wearing unsuitable glasses: Some people do not go to the regular hospital for eye examination and buy glasses at random. Wearing them causes eye discomfort, which can also lead to increased myopia. 3. Glaucoma: This can lead to a sustained increase in intraocular pressure, which damages the eye tissue and optic nerve, causing an increase in the number of eyes, which can lead to blindness in serious cases. If your myopia deepens within a short period of time, it is recommended that you consult a doctor for further examination to identify the cause and provide targeted treatment or therapy.