The Sunglasses Lens Colour Guide
Posts
How To Determine Your Face Shape
How to determine your face shape Step 1: The Right Tools Sure, you’ve probably got a builder’s tape measure knocking about somewhere, but good luck wrapping that rigid piece of metal around your head. To make things easier (and more accurate) arm yourself with a flexible tape measure , like the kind used by a tailor. Then, grab a notebook and in front of a mirror take the following measurements, recording each as you go. Step 2: Measure Your Forehead In order to work out which face shape you have, you need to find out which parts are long, which ones are short or whether they’re actually all the same. The forehead is a good place to start, so measure across the widest part – this is usually around halfway between your eyebrows and your hairline. Step 3: Measure Your Cheekbones The width of your cheekbones is especially important when it comes to picking a hairstyle. Getting it wrong can throw features like your ears way off ...
What is Polarized Sunglasses? Polarized sunglasses are specialized eyewear designed to reduce glare from surfaces such as water, snow, and glass. Glare distorts the true color of objects and makes them harder to distinguish. Polarized sunglasses can be useful for certain sports and driving, helping participants to see more clearly and avoid potential hazards . How Polarized Lenses Work Polarized lenses are available in a variety of colors , depending on the material from which the lenses are made. Darker colors provide higher levels of polarization. Sunlight can be absorbed or reflected in several different directions. Sunlight that is bouncing off horizontal surfaces such as water, land, or the hood of a car is usually reflected back in a similar horizontal direction. This reflection produces an agitating source of glare that cannot only create visual discomfort but can also cause a potentially blinding glare. Glare has the pot...
What is Polycarbonate? Polycarbonate, or specifically polycarbonate of bisphenol A , is a clear plastic used to make shatterproof windows, lightweight eyeglass lenses, and such. General Electric makes this stuff and sells it as Lexan. Polycarbonate gets its name from the carbonate groups in its backbone chain. The following lenses are lighter, thinner, and more scratch-resistant than glass or the older plastic types. Polycarbonate. ... Trivex. ... High-index plastic. ... Aspheric. ... Photochromic. ... Polarized sunglasses. The Safety of Food Containers Made of Polycarbonate Plastic. ... A raw material used in polycarbonate plastics, bisphenol A (BPA), has been the subject of news reports questioning its safety . Extensive safety data on BPA show that polycarbonate plastic can be used safely in consumer products.