This type of glasses can be equipped with lenses, please communicate with customer service in advance. [Please be sure to provide the prescription data or old frame data that are suitable for you to try on, preferably within six months. You can take photos and send them to customer service] Right eye R: degree ( ) astigmatism ( ) axis ( ) Left eye L: degree ( ) astigmatism ( ) axis ( ) Interpupillary distance PD: ( ) Pupil height PH: ( ) Non-progressive films are not available If you don’t have astigmatism, just leave the astigmatism and axis options blank. (See the instructions for wearing glasses for the available range) If there is no pupil height data, the golden ratio (frame height * 0.618) is used as the pupil height data by default. The lenses are customized. Once processed, returns and exchanges are not supported. Please understand. If you don't know the degree, you can go to the hospital for an optometrist. It is best to have the optometrist write it down in hand (customized lenses take about 5-7 working days to be shipped).