Contact lenses that are 600 diopters may be around 650 diopters with frames, but the exact result will need to be determined by an optometry and fitting. Contact lenses that are 600 diopters may not have astigmatism involved and may have a degree of astigmatism when frames are fitted, again depending on the results of the optometry. If the contact lenses are removed and the frames are refitted, it is necessary to stop wearing them for a certain period of time, 1 week for soft contact lenses and 3-4 weeks for hard contact lenses, in order to get a relatively accurate prescription, and then according to this prescription, the subjective optometry, that is, the insertion and trial fitting of the glasses, will be carried out. After the insertion and trial fitting, the prescription can be made according to the degree of trial fitting, the degree of prescription and contact lenses will have a relative deviation, the larger the degree of myopia, the greater the deviation, 600 degrees may be about 50-75 degrees difference, there may be astigmatism differences, need to be based on the results of the final optometric decision.