Why do you charge an additional $10 on these frames to process my PD of 60? I cannot find anything in this frame detail that specifies a minimum PD. I also get the same $10 charge if I try 61 or 62. What's the minimum and why does it cost more? Other sites I've tried do not have this additional charge for very similar sized (large) frames.

Dear Customer, thank you for contacting Firmoo. Due to the size of the frame (lens size) in combination with your PD measurements, the lens would not be cut out properly and we need to use a special lens to fit your vision needs. However, if you don't want to pay an extra $10 for the special lens, we suggest you choose a smaller frame. You can also check on the size of your old pair and compare it to this frame. There is no minimum PD, it's the frame size that matters. For the specific frame, if the diagonal lens size*2 + bridge distance-PD+2mm>The maximum diameter of lenses, then the special lenses (decentration lenses) are needed. We understand that choosing a perfect frame size online can be tough sometimes so we suggest that you could please check this link https://www.firmoo.com/help-p-1.shtml for reference. For any further questions or immediate assistance, you may also call our call center thru toll-free hotline at 1-855-487-6006 opens every day from 7 a.m.- 4 p.m. PDT. You can also contact us through our Live Chat Support Team: Start a live chat (Everyday, 3 a.m.- 12-midnight PDT.) or email us at service@firmoo.com. Please stay safe and healthy!

what is the minimum PD?

Dear Customer, thank you for contacting Firmoo. The frame size is the one that matters. I suggest you check your old frame size and compare it to this one. There is no minimum PD. However, to avoid a special lens we kindly suggest you choose a frame by following this formula: the bridge distance plus eye size (lens width) equals or close to your PD. Moreover, PD stands for Pupillary Distance, which is the distance between your pupils in millimeters. PD is very important for accurately fitting your lenses to achieve visual acuity. Please kindly confirm with your eye doctor on the PD, Or you can also measure it in this way https://www.firmoo.com/help-p-43.shtml to confirm. Hope this is helpful. For any further questions or immediate assistance, you may also call our call center thru toll-free hotline at 1-855-487-6006 opens every day from 7 a.m.- 4 p.m. PDT. You can also contact us through our Live Chat Support Team: Start a live chat (Everyday, 4 a.m.-10 p.m. PDT.) or email us at service@firmoo.com. Please stay safe and healthy!

Why do you charge an additional $10 on these frames to process my PD of 60? I cannot find anything in this frame detail that specifies a minimum PD. I also get the same $10 charge if I try 61 or 62. What's the minimum and why does it cost more? Other sites I've tried do not have this additional charge for very similar sized (large) frames.

Dear Customer, thank you for contacting Firmoo. Due to the size of the frame (lens size) in combination with your PD measurements, the lens would not be cut out properly and we need to use a special lens to fit your vision needs. However, if you don't want to pay an extra $10 for the special lens, we suggest you choose a smaller frame. You can also check on the size of your old pair and compare it to this frame. There is no minimum PD, it's the frame size that matters. For the specific frame, if the diagonal lens size*2 + bridge distance-PD+2mm>The maximum diameter of lenses, then the special lenses (decentration lenses) are needed. We understand that choosing a perfect frame size online can be tough sometimes so we suggest that you could please check this link https://www.firmoo.com/help-p-1.shtml for reference. For any further questions or immediate assistance, you may also call our call center thru toll-free hotline at 1-855-487-6006 opens every day from 7 a.m.- 4 p.m. PDT. You can also contact us through our Live Chat Support Team: Start a live chat (Everyday, 3 a.m.- 12-midnight PDT.) or email us at service@firmoo.com. Please stay safe and healthy!

what is the minimum PD?

Dear Customer, thank you for contacting Firmoo. The frame size is the one that matters. I suggest you check your old frame size and compare it to this one. There is no minimum PD. However, to avoid a special lens we kindly suggest you choose a frame by following this formula: the bridge distance plus eye size (lens width) equals or close to your PD. Moreover, PD stands for Pupillary Distance, which is the distance between your pupils in millimeters. PD is very important for accurately fitting your lenses to achieve visual acuity. Please kindly confirm with your eye doctor on the PD, Or you can also measure it in this way https://www.firmoo.com/help-p-43.shtml to confirm. Hope this is helpful. For any further questions or immediate assistance, you may also call our call center thru toll-free hotline at 1-855-487-6006 opens every day from 7 a.m.- 4 p.m. PDT. You can also contact us through our Live Chat Support Team: Start a live chat (Everyday, 4 a.m.-10 p.m. PDT.) or email us at service@firmoo.com. Please stay safe and healthy!