Dear Customer, thank you for contacting Firmoo. For the lens thickness, it is determined by the frame size (including lens height, lens width), lens choice, frame material, and your PD. Moreover, this frame will work since it's a full acetate frame with no more than 40mm lens height. However, I also suggest you choose a suitable index lens, 1.67 or 1.74 for your strong prescription. 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 firstname.lastname@example.org. Please stay safe and healthy!