Date First Available:May 13, 2019 ASIN:B09VYJNSQ3 Imported Metal frame Acrylic lens Non Polarized FL-41 tint with 100% UVA/UVB blocking (UV400) coating Lens width: 52 millimeters Lens height: 40 millimeters Bridge: 20 millimeters Arm: 147 millimeters Designed for light sensitivity protection: TheraSpecs target blue light near 480nm, the most harmful wavelength for light-sensitive conditions like migraine, concussion, dry eyes, and vestibular disorders. Our advanced blue light filtering means your eyes and brain can feel protected even when exposed to triggering light. 25x more protection: TheraSpecs remove as much as 25 times more blue light at 480nm than typical blue light glasses with clear- or yellow-tinted lenses. They also filter more across a wide range of harmful blue light so you stay protected against screens, fluorescent lighting, and LEDs. Feel the difference: Tens of thousands of people have chosen TheraSpecs, and they have a 96% satisfaction rate for light sensitivity protection and symptom relief after 3 weeks of use. Thousands of headache specialists, neurologists, and physical and occupational therapists recommend TheraSpecs for their patients. Indoor lenses: Indoor TheraSpecs use FL-41 lenses and block 100% UVA/UVB light. Wear them near fluorescents, LEDs, and other artificial light, while looking at computer or device screens, and/or outdoors on overcast days. Highly protective, lightweight frame: Winslow TheraSpecs are made of lightweight acetate and feature metal rims that hold large, therapeutic lenses. Popular eyewear style with black finish.