Ray-Ban uses four different types of lenses with regard to their sunglasses. The B15 XLT lens, the ray ban usa, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about them (they only may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of Ultra violet rays and enable only 15% in the visible light to pass through them (that’s an 85% reduction!). These brown lenses also offer much more contrast by lowering on the volume of blue light, instead of a G15 lens (that is described in the next paragraph). Blue light is extremely easily captured with the eye and has the result of softening other colours which can be harsher to your vision. Put simply, by reducing the amount of blue light, the differences between colours and brightness of objects tend to be more pronounced.
The G15 XLT lenses have similar properties as being the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens is definitely the original aviator lens the military requested Ray-Ban to formulate. The challenge ended up being to design a lens which was “colour neutral”; in other words, a lens that filters light much like the human eye does. If you prefer a lens which offers a little less contrast between colours, then this G15 XLT lens is made for you since it offers similar colour-sensitivity towards the eye. By using a lower contrast lens, the main difference in colour and brightness of objects will be dampened. Because of this the colours the truth is with these lenses is going to be natural and soft around the eyes.
Both the B15 and G15 XLT lenses are created from impact resistant optical glass which is naturally scratch resistant. Quality and stability are remarkable as well as over time you will see virtually no fading whatsoever from the colour.
Polarized lenses essentially trim down the amount of glare manufactured by reflective surfaces like water or some other semi-transparent objects, and also some metallic surfaces. Glare refers to the difficulty of seeing in bright light.
Sunlight, as an example, bounces off surfaces in all of the directions (i.e. vertically, horizontally or diagonally). For individuals that are active within the “horizontal plane”, it means the bright sunlight bounced horizontally enters the attention inside a similar fashion. This leads to the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the path ahead of them if they’re driving in very sunny conditions (in case the sun is ahead of them).
Polarized lenses have got a laminated surface with vertical stripes that create a filter, which effectively reduces the horizontally-polarized light and allows only vertically-polarized light in. Quite simply, if you be over a clear lake you may probably see under the surface or if you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can become distorted or maybe you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are extremely useful, specially the polarized ones, but expect to pay limited on the sunglasses.
The lens base simply refers back to the base curve or perhaps the front curve in the lens measured in “diopters”, and that is a term that basically only matters to opticians. You’ll learn that many ray ban usa have got a “Lens Base 6”, which basically signifies that they’re sufficiently curved and made to to operate as sunglasses (i.e., they cover your eyes enough).
Lens size is measured in millimeters and refers back to the length (or width) of a single lens. Bear that under consideration when making any purchase. Many Ray-Ban models are available in a number of sizes of lens. Make certain you obtain the size which fits your face or else you may get a kind of aviator shades that don’t fit properly.