VIVIENFANG Women Classic Oversized Polarized Sunglasses Elegant Fashion Driving Shades For Lady P1981 Imported plastic frame anti-reflective lens polarized Lens width: 63 millimeters Lens height: 54 millimeters GREAT CLARITY OF VISION--100% UV400 protection coating,blocks 100% harmful UVA & UVB Rays. VIVIENFANG Sunglasses use 1.1 mm Polarized Lenses which offer more impact to reduce debilitating glare and light scatter,thus reducing general eye fatigue.They provide a natural vision from transmitting original colors without any modifications. SOME PEOPLE ARE MORE SENSITIVE TO POLARIZATION AND SOME ARE NOT--so this could be akin to other people getting dizzy with polarized shades and some not.This isn't quality problem,it is therefore recommended that sensitive people choose NON-POLARIZED sunglasses.There is an easy ways to check if your lenses are polarized,by staring at a digital screen, like a phone or dashboard in your car, you will immediately see a rainbow over it. WE'VE UPPED THE QUALITY, NOT THE PRICE--It is made of high quality polycarbonate, lightweight but durable,comfortable.Lightweight design,let your nose feel comfortable even wearing for a long time.Suitable for people who spend a lot of time outside. MATTERS NEED ATTENTION--Polarized lenses are made from thin sheets of film,they're coated with a special chemical film that helps reduce glare,please do not drop Polarized sunglasses in the seawater or pool for long time as the water is too strong which might hurts the coating ,and the coating of the lens will start peeling. RETURNS & EXCHANGE--We will gladly accept returns of unworn, undamaged or defective merchandise purchased on amazon for full refund or exchange within 30 days of the original purchase.If you have any questions,please do not hesitate to contact us. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! <span class="a-text-bold">Increases visual comfort.</span> Since your eyes arent constantly challenged by glare, it is easier to view objects in bright conditions. <span class="a-text-bold">Reduces eyestrain.</span> Frequent adjustments to the glare from reflections is taxing on the eyes and can lead to eye fatigue.