Best Biconcave Lenses

KastKing Skidaway Polarized Sport Sunglasses for Men and Women, Matte Blackout Frame, Smoke Base Ice Mirror

  • KEY FEATURES - Polarized lenses reduce glare - Impact resistant TAC lenses protect your eyes from flying objects - Block 100% of the harmful UVA and UVB rays - Lightweight, durable, and comfortable Grilamid frames.
  • OUTSTANDING LENSES – 1.0mm polarized lenses are comparable to the thickness you would find on much higher priced sports eyewear. KastKing TAC (Triacetate) lenses pass a double decentering test to ensure there is no optical distortion which can cause eye strain and headaches. KastKing Polarized reading sunglasses help reduce glare caused by reflected light to improve vision and comfort..
  • SUPERIOR FRAMES – Made from the same Grilamid material commonly used by the military and in medical applications, our frames are lightweight, extremely flexible, and heat and UV resistant. Grilamid frames are well known for their strength, lightweight comfort, shape integrity, and impact resistance. This ultra-lightweight and malleable material translates to a very comfortable fit..
  • BASE LENS COLOR and UV PROTECTION – Smoke lenses are ideal for bright sunlight with the most realistic color reproduction and also work well in medium light and partial shade. Brown lenses increase contrast and depth perception, ideal for partly cloudy to sunny conditions. Co....
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Spy Cooper XL Rectangular Wrap Sunglasses Color and Contrast Enhancing Lenses Matte Black - Grey Lenses

  • ICONIC STYLE: One of our original designs, the Cooper has a cult following any California guru would be proud to call his or her own. No surprise, considering its iconic look and performance epitomize everything SPY. The Cooper XL Style features a matte finish and custom gray lenses. The frames are built with 59mm lenses, a 16mm bridge and a total frame length of 127mm.
  • GREAT LENSES: 100% UV protection reduces eye fatigue and long-term sun damage, and our 6-base polycarbonate ARC lens technology provides increased optical performance.
  • SAFETY FIRST: All Spy Optic sunglasses are designed to be lived in and are tested by world class athletes around the world. The Cooper XL Sunglasses will stand up to any challenges you throw at them, the lenses are Shatter Resistant and the durable frames and hinges are made to last. Take these glasses anywhere with you. They’re perfect for snowboarding, boating, offroading, fishing, hunting, backpacking and much more!.
  • HIGH DEF LENSES: Our lenses are engineered to provide optimal clarity, providing visual comfort when driving or during any outdoor activity. The Cooper XL sunglasses feature our trademarked 8-base polycarbonate ARC lenses for optimal clarity. We treat all our lenses for scratch resistance. Our polari....
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Costa Del Mar mens Tuna Alley Sunglasses, Blackout/Copper Green Mirrored Polarized-580g, 62 mm US

  • 100% UV PROTECTION: All Costa Del Mar Eyewear lenses block potentially harmful high-energy visible blue light rays and protect against 100% of Ultraviolet rays (up to 400nm)..
  • COSTA 580G GLASS LENSES: Costa’s patented 580G glass lenses provide scratch-proof clarity. 580 lenses go further then normal polarized lenses by blocking the perfect amount of harsh yellow light and potentially harmful blue light while enhancing beneficial reds, blues and greens..
  • OPTIMAL USAGE: Costa's Copper Green lenses are our most versatile lenses, excellent for cloudy days, everyday activities, sight fishing and contrast for fishing inshore and on flats..
  • CO-INJECTED NYLON FRAMES: Costa's co-injected nylon frames are tough and durable, manufactured using the environmentally friendly bio-resin process. TR-90 nylon is a premier material for sports and performance frames as it is resistant to heat and cold..
  • VISIT THE COSTA DEL MAR BRAND SHOP: Visit the Costa Del Mar brand shop to view the entire Costa Del Mar eyewear collection..
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Canada flyer collection

  • 100% UV PROTECTION: All Costa Del Mar Eyewear lenses block potentially harmful high-energy visible blue light rays and protect against 100% of Ultraviolet rays (up to 400nm)..
  • COSTA 580P POLYCARBONATE LENSES: Costa’s patented 580p polycarbonate lenses are lightweight and impact-resistant. 580 lenses go further then normal polarized lenses by blocking the perfect amount of harsh yellow light and potentially harmful blue light while enhancing beneficial reds, blues and greens..
  • OPTIMAL USAGE: Costa's Grey lenses are great for all-around activities with a natural contrast. It's a good everyday choice for activities on the water and land..
  • METAL FRAMES: Costa's metal frames are made of marine-grade corrosion-resistant Monel. Monel's super tough, corrosion-resistant alloy is often used in marine applications. If you are on the water a lot, Monel stands up to the challenge..
  • VISIT THE COSTA DEL MAR BRAND SHOP: Visit the Costa Del Mar brand shop to view the entire Costa Del Mar eyewear collection..
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Costa Del Mar mens Reefton Sunglasses, Matte Grey/Copper Green Mirrored Polarized-580p, 64 mm US

  • 100% UV PROTECTION: All Costa Del Mar Eyewear lenses block potentially harmful high-energy visible blue light rays and protect against 100% of Ultraviolet rays (up to 400nm)..
  • COSTA 580P POLYCARBONATE LENSES: Costa’s patented 580p polycarbonate lenses are lightweight and impact-resistant. 580 lenses go further then normal polarized lenses by blocking the perfect amount of harsh yellow light and potentially harmful blue light while enhancing beneficial reds, blues and greens..
  • OPTIMAL USAGE: Costa's Copper Green lenses are our most versatile lenses, excellent for cloudy days, everyday activities, sight fishing and contrast for fishing inshore and on flats..
  • CO-INJECTED NYLON FRAMES: Costa's co-injected nylon frames are tough and durable, manufactured using the environmentally friendly bio-resin process. TR-90 nylon is a premier material for sports and performance frames as it is resistant to heat and cold..
  • VISIT THE COSTA DEL MAR BRAND SHOP: Visit the Costa Del Mar brand shop to view the entire Costa Del Mar eyewear collection..
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iPhone 7+ Black Universal 3 in 1 Camera Lens Kit - Micro Wide Angle and Fish Eye

  • Wide angle, Micro (close up) and Fish Eye lenses in a 3 in 1 set: These two small lenses are screwed together for easy storage. To use the wide angle,....
  • Three great lenses in one kit: The fisheye, micro and wide angle lenses give you an array of shooting options to help you enhance your mobile....
  • Universal lens clip: The lens included in this set can be used with a wide range of cell phones and mobile devices including iPhone 6, 6+, 5, 5C, 5S,....
  • High quality aluminum construction: The lenses are made from aluminum to increase the durability of the product..
  • Velvet carrying bag included: Keep lenses clean and safe - store them in the velvet bag provided..
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KastKing Skidaway Polarized Sport Sunglasses for Men and Women, Matte Orange Blackout Frame, Copper Base White Steel Mirror

  • KEY FEATURES - Polarized lenses reduce glare - Impact resistant TAC lenses protect your eyes from flying objects - Block 100% of the harmful UVA and UVB rays - Lightweight, durable, and comfortable Grilamid frames.
  • OUTSTANDING LENSES – 1.0mm polarized lenses are comparable to the thickness you would find on much higher priced sports eyewear. KastKing TAC (Triacetate) lenses pass a double decentering test to ensure there is no optical distortion which can cause eye strain and headaches. KastKing Polarized reading sunglasses help reduce glare caused by reflected light to improve vision and comfort..
  • SUPERIOR FRAMES – Made from the same Grilamid material commonly used by the military and in medical applications, our frames are lightweight, extremely flexible, and heat and UV resistant. Grilamid frames are well known for their strength, lightweight comfort, shape integrity, and impact resistance. This ultra-lightweight and malleable material translates to a very comfortable fit..
  • BASE LENS COLOR and UV PROTECTION – Smoke lenses are ideal for bright sunlight with the most realistic color reproduction and also work well in medium light and partial shade. Brown lenses increase contrast and depth perception, ideal for partly cloudy to sunny conditions. Co....
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Costa Del Mar Men's Zane Polarized Rectangular Sunglasses, Tortoise/Copper Green Mirrored Polarized-580G, 61 mm

  • 100% UV PROTECTION: All Costa Del Mar Eyewear lenses block potentially harmful high-energy visible blue light rays and protect against 100% of Ultraviolet rays (up to 400nm)..
  • COSTA 580G GLASS LENSES: Costa’s patented 580G glass lenses provide scratch-proof clarity. 580 lenses go further then normal polarized lenses by blocking the perfect amount of harsh yellow light and potentially harmful blue light while enhancing beneficial reds, blues and greens..
  • OPTIMAL USAGE: Costa's Copper Green lenses are our most versatile lenses, excellent for cloudy days, everyday activities, sight fishing and contrast for fishing inshore and on flats..
  • CO-INJECTED NYLON FRAMES: Costa's co-injected nylon frames are tough and durable, manufactured using the environmentally friendly bio-resin process. TR-90 nylon is a premier material for sports and performance frames as it is resistant to heat and cold..
  • VISIT THE COSTA DEL MAR BRAND SHOP: Visit the Costa Del Mar brand shop to view the entire Costa Del Mar eyewear collection..
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Costa Del Mar Men's Saltbreak Polarized Rectangular Sunglasses, Tortoise/Copper Green Mirrored Polarized-580P, 65 mm

  • 100% UV PROTECTION: All Costa Del Mar Eyewear lenses block potentially harmful high-energy visible blue light rays and protect against 100% of Ultraviolet rays (up to 400nm)..
  • COSTA 580P POLYCARBONATE LENSES: Costa’s patented 580p polycarbonate lenses are lightweight and impact-resistant. 580 lenses go further then normal polarized lenses by blocking the perfect amount of harsh yellow light and potentially harmful blue light while enhancing beneficial reds, blues and greens..
  • OPTIMAL USAGE: Costa's Copper Green lenses are our most versatile lenses, excellent for cloudy days, everyday activities, sight fishing and contrast for fishing inshore and on flats..
  • CO-INJECTED NYLON FRAMES: Costa's co-injected nylon frames are tough and durable, manufactured using the environmentally friendly bio-resin process. TR-90 nylon is a premier material for sports and performance frames as it is resistant to heat and cold..
  • VISIT THE COSTA DEL MAR BRAND SHOP: Visit the Costa Del Mar brand shop to view the entire Costa Del Mar eyewear collection..
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KastKing Hiwassee Polarized Sport Sunglasses for Men and Women, Matte Smoke Crystal Frame,Smoke Lens

  • KEY FEATURES - Polarized lenses reduce glare - Impact resistant TAC lenses protect your eyes from flying objects - Lightweight, durable, and comfortable Grilamid frames Anti-slip nose and temple pads - Block 100% of the harmful UVA and UVB rays.
  • OUTSTANDING LENSES 1.0mm polarized lenses are comparable to the thickness you would find on much higher priced sports eyewear. KastKing TAC (Triacetate) lenses pass a double decentering test to ensure there is no optical distortion which can cause eye strain and headaches. KastKing Polarized reading sunglasses help reduce glare caused by reflected light to improve vision and comfort..
  • PREMIUM FRAMES Made from the same Grilamid material commonly used in military and medical applications, KastKing sunglass frames are lightweight, extremely flexible, and heat and UV resistant. Grilamid frames are well known for their astounding strength, lightweight comfort, shape integrity, and impact resistance. This virtually indestructible ultra-lightweight and malleable material translates to a very comfortable fit and the tacky nose and temple pads prevent slipping..
  • BASE LENS COLOR and UV PROTECTION Smoke lenses are ideal for bright sunlight with the most realistic color reproduction and also work well in medium light an....
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