Dear Customer, thank you for contacting Firmoo. As checked, you have a very strong prescription. The prescription will ultimately determine how thick the lenses will be. The higher the prescription, the thicker the lens. Also, for the lens thickness, it is determined by the frame size (including lens height, lens width), lens choice, frame material, and your PD. The thick lenses can not only cause vision blurry and distortion but also can cause headaches, dizziness, and other discomforts. Moreover, the metal frame can not hide the lens thickness as well. For your reference, I kindly recommend you choose a narrow and short acetate frame that can hide the lens thickness a bit. Moreover, the frame height no more than 40mm is highly suggested. 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 email@example.com. Please stay safe and healthy!