Ray-Ban uses four different kinds of lenses for their sunglasses. The B15 XLT lens, the ray ban sale, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about the subject (they only can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of UV rays and permit only 15% from the visible light to pass through them (that’s an 85% reduction!). These brown lenses also provide a bit more contrast by lowering on the volume of blue light, instead of a G15 lens (that is described over the following paragraph). Blue light is very easily captured from the eye and it has the result of softening other colours which are harsher to our own vision. To put it differently, by reduction of the level of blue light, the differences between colours and brightness of objects tend to be more pronounced.
The G15 XLT lenses have similar properties as the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens may be the original aviator lens that the military requested Ray-Ban to formulate. The challenge was to design a lens which had been “colour neutral”; to put it differently, a lens that filters light such as the human eye does. If you need a lens that gives a little less contrast between colours, then a G15 XLT lens is designed for you because it offers similar colour-sensitivity towards the human eye. Using a lower contrast lens, the visible difference in colour and brightness of objects will be dampened. This means that the colours the thing is with these lenses is going to be natural and soft on the eyes.
The B15 and G15 XLT lenses are constructed with impact resistant optical glass that may be naturally scratch resistant. Quality and stability are remarkable and also over time you will see basically no fading whatsoever from the colour.
Polarized lenses essentially trim down the level of glare produced by reflective surfaces like water or another semi-transparent objects, as well as some metallic surfaces. Glare refers to the difficulty of seeing in bright light.
Sunlight, for instance, bounces off surfaces in every directions (i.e. vertically, horizontally or diagonally). For individuals that are active in the “horizontal plane”, it indicates that this bright sunlight bounced horizontally enters the eye in the similar fashion. This will cause the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the road in front of them if they’re driving in very sunny conditions (in case the sun is in front of them).
Polarized lenses possess a laminated surface with vertical stripes that create a filter, which effectively omits the horizontally-polarized light and allows only vertically-polarized light in. To put it differently, if you happen to be over a clear lake you may probably see within the surface or maybe you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can get distorted or perhaps you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are incredibly useful, especially the polarized ones, but count on paying limited in the sunglasses.
The lens base simply signifies the base curve or even the front curve from the lens measured in “diopters”, which is a term that really only matters to opticians. You’ll learn that many ray ban 90 off have a “Lens Base 6”, which basically ensures that they’re sufficiently curved and built to to work as sunglasses (i.e., they cover your eyes enough).
Lens dimensions are measured in millimeters and signifies the length (or width) of just one lens. Bear that under consideration when coming up with any purchase. Many Ray-Ban models can be found in many different sizes of lens. Make sure you have the size which fits your facial skin or perhaps you may end up with a set of aviator shades that don’t fit properly.