Well, yes, high myopia can cause the blindness. So if you have high myopia, you should be careful about it. And in some cases, I suggest you should go and see a doctor, so that he can tell you what to do to prevent it. As we know that high myopia, is a leading cause of blindness. Also, according to some research, the degree of myopia have be related to degenerative eye conditions and diseases like glaucoma and cataract , which can affect both vision and ocular health. Also you should know that high myopia is caused by abnormal elongation of the eyes, so the retina and parts of the eye, which are responsible for sending signals to the optical nerve, are most affected. In this way, it can lead to blindness. So just pay more attention to your eyes, when you have this symptom.