Even after astigmatism is correctly dispensed, refractive errors such as astigmatism or myopia may increase due to prolonged eye use and long term improper postures. For the prevention and control of astigmatism and myopia, optometry is only one of the ways and not the most important preventive and control measures, when long-term close eye use and long time side sleep, will lead to myopia and astigmatism may increase. For the prevention and control of refractive errors such as myopia and astigmatism, we should not rely too much on external tools or measures such as optometry, and we need to recognize the importance of comprehensive prevention and control, and timely adjustment of irrational eye habits such as prolonged close-distance use of the eyes, and participation in outdoor activities have an important role to play in the prevention and control of myopia.