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Kind reminder: It is recommended to inform customer service of the prescription information in the form of text or pictures after ordering, so as to ensure that the prescription filled in the order is consistent with your prescription!!! Dear customers, Please provide your prescription By the following format, Right(OD) SHP: CYL: AXIS : Left(OS) SHP: CYL: AXIS : ADD: PD: Or Send Me Your Prescription Photo. The following situations may require additional price differences ① When the absolute value of your prescription CYL is greater than 2, you only need to enter (± 2), then enter your prescription information normally and submit the order for payment. If the absolute value of CYL is greater than 2, you need to pay a price difference of $10. The anti fog function requires a payment of $20 Thin lens design requires a payment of $20 Anti glare requires a payment of $10 Lens blue film requires a payment of $5 $10 link:https://www.aliexpress.us/item/3256809438898389.html?gatewayAdapt=glo2usa4itemAdapt The above situation requires a price difference. After receiving your order, customer service will contact you to make up the difference. We hope you can cooperate, or you can pay the $10 link below. Thank you all and have a wonderful day. How to purchase prescription glasses? 1. How to choose between single version and progressive version? ① When you need to see far and near for use, and there is ADD data in the prescription, please select the progressive version and enter detailed prescription information. ② If you only need to see far or near for use, please select the single version and enter detailed prescription information. ③ When you are unable to input detailed prescription information, please do not worry. Please purchase the correct and suitable prescription glasses according to these points, and then inform customer service of the prescription information in the form of text or pictures. This way, customer service will also note the prescription information to the optometrist to make the correct prescription glasses for you. 2. How to choose the refractive index of lenses (1.56/1.61/1.67/1.74) (The higher the refractive index of lenses, the thinner they are, and the more comfortable they are to wear) ① If the sum of your SPH and CYL numbers is less than 300 degrees, it is generally recommended to choose lenses with a refractive index of 1.56. Of course, lenses with a refractive index of 1.61/1.67 are also suitable, as they will be thinner and more comfortable to wear. ② If the sum of your SPH and CYL numbers is greater than 300 and less than 500 degrees, generally choose 1.61 lenses. Of course, 1.67/1.74 lenses are also suitable as they will be thinner and more comfortable to wear. ③ If the sum of your SPH and CYL numbers is greater than 500 and less than 800 degrees, generally choose 1.67 lenses. Of course, 1.74 lenses are also suitable as they will be thinner and more comfortable to wear. ④ If the sum of your SPH and CYL numbers is greater than 800 degrees, a lens of 1.74 is generally chosen. 3. How to choose lens functions? ① Photo Brown/Photo Grey: Lenses do not have anti blue light function, but have anti reflection function. Lenses will darken in sunlight, turning brown and gray (changing color with the intensity of ultraviolet light) ② Anti Blue Ray+Photo Brown/Anti Blue Ray+Photo Grey: Lenses have anti blue light function and anti reflection function. Lenses will darken in sunlight, turning brown and gray (changing color with UV intensity). Relatively ①, it is more recommended to choose ② ③ Polarized/Color Tint: The lenses are colored and default to black gray lenses. They are prescription sunglasses. If you need sunglasses with lenses of other colors, please contact customer service to choose the color you prefer. ④ None: This lens only has anti reflection function, make prescription glasses according to the prescription ⑤ Anti Blue Ray: The lenses have anti blue light and anti reflection functions, which are our most commonly used prescription glasses I hope these are helpful to you. If you have any other questions, please contact customer service. Wishing you a wonderful day.