Leader xrx swim goggle information designed to accommodate virtually any prescription 16.00D to -16.00D adult size and junior sizes available reusable plastic case included hypo-allergenic silicone eye seals and strap unique, leak proof lens bevel design requires special edging for prescription if trying to have filled locally 3 sizes of interchangeable nose bridges on adult goggle, adjustable nose bridge on junior goggle complete goggle with prescription lenses start at only 175. Bridge sizes: measured from inside of right lens to inside of left lens--to measure on face, measure inside tear duct to tear duct wrapped around nose with flexible measuring tape . Adult bridge sizes: large: 22mm, medium: 20mm, small: 18mmjunior bridge sizes: large: 22mm, medium: 18mm, small: 15mm eyesize: adult a: 38 b: 27 junior a: 33 b: 23 see more help tab for eyesize information custom prescription lenses available to your exact prescription including astigmatism so vision will be just like glasses not premade lenses . For additional brand information and warranty details, see hilco leader brand page. Please note: frames do not come with any lenses if ordering just to try or have fit made locally. Prescription information prices quoted above are for hilco authentic polycarbonate prescription lenses in prescriptions 6.00 To -6.00 With up to 4.00 Cylinder. Higher powers available for a additional charges 16.00D to -16.00D hilco prescription lenses take about 2-3 weeks to make. Note: we recom...