The main symptom of deepening is still the loss of vision, blurred vision, and even double vision. In the case of myopia, the main symptom is increased blurring of vision at a distance, especially when looking at the blackboard or driving, or when watching movies. If the astigmatism increases, mostly at night, there will be a significant increase in seeing, and there may also be a feeling of double vision and vagueness. In this case, it is necessary to go to the hospital to dilate the pupil, after the pupil is dilated, it is obvious that the growth trend of the prescription and the growth of the prescription, after the prescription according to the post-optometric prescription, the symptoms of blurred vision and double vision can usually be improved.