Check the listing for details. PILESTONE® Color Blind Corrective Glasses for Red-Green/Blue-Yellow Deficiency. Condition: New with tags. Listed at 99.00 USD. PILESTONE® Color Blind Corrective Glassesfor Protan, Deutan, Tritan Color Vision Deficiency *PilestoneSkinCare is the ONLY authorized seller on EBay; Buyers be aware of counterfeits WONDER WHICH ONE TO CHOOSE? Take our free world-class color blind test (https://pilestone.com/pages/color-blind-test) now and find the lens type best for you in 2 minutes. 3 MAIN TYPES OF COLOR DEFICIENCIES CAN BE IMPROVED* Deuteranomaly/Deuteranopia commonly referred to as "red-green" color blindness and can affect a broad range of colors Protanomaly/Protanopia a less common subtype of red-green color blindness that mostly affects reds Tritanomaly/Tritanopia a very rare type of color blindness that affects only 1 in every 100 people with color blindness and specifically impacts the blue-yellow spectrum. It's worth noting that solutions for Tritan color blindness are only offered by Pilestone. CHOOSE THE CORRECT LENS: Lens A (Universal, Indoor & Outdoor) This lens is universal, meaning it is equipped with the necessary technology for deutan and protan color blindness (red-green blindness). People with mild/moderate color blindness typically show the best results from this lens. Lens B (Universal, Indoor & Outdoor) Our most popular and effective lens for most users especially for bright outdoor scenic locations. Similar to lens A, but has a darker tint to the lens. Our lens B is universal and therefore developed for people with deutan and protan color blindness (red-green blindness). People with strong/severe color blindness typically show the best results from this lens. Lens C (Indoor lens) Designed specifically for lower lighting conditions. People that need color blind glasses primarily for indoor use will benefit most from this lens. Recommended for those with mild/moderate and strong deutan (red-green blindness). Lens D (Protan color blindness) Lens D is designed for those with protan color blindness (red blindness). People with strong/severe protan color blindness typically show the best results from this lens. Lens E (Tritan color blindness, Indoor & Outdoor) Designed specifically for those who suffer from tritan color blindness. Tritan color blindness affects the blue-yellow color spectrum. ADD PRESCRIPTION Single vision or reading prescription (+$70) and progressive prescription (+$100) can be customized for your needs. Our Clip-on style is another good choice. (https://pilestone.com/pages/add-prescription) Please note: * Prescription pairs take around 4-6 weeks for delivery. * Please kindly understand that colorblindness is NOT uniformed, and our glasses are universally designed to cope with the most common conditions. There is a 10-15% chance that our glasses completely don’t work even if you pick the one suggested by our FREE online colorblind test. Non-prescription glasses can be returned for a refund in 60 days of delivery, but all prescription glasses are customized and non-refundable, so we highly recommend trying on non-prescription pairs first.