Ray-Ban uses four different kinds 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 the subject (they simply can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the Ultra violet rays and enable only 15% of your visible light to successfully pass through them (that’s an 85% reduction!). These brown lenses also offer a bit more contrast by reducing on the level of blue light, instead of a G15 lens (that is described within the next paragraph). Blue light is quite easily captured from the eye and it has the effect of softening other colours that are harsher to our vision. Quite simply, by reduction of the volume of blue light, the differences between colours and brightness of objects tend to be more pronounced.
The G15 XLT lenses have the same properties since the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens may be the original aviator lens that this military requested Ray-Ban to build up. The process ended up being to design a lens that had been “colour neutral”; quite simply, a lens that filters light like the eye does. If you need a lens that offers a little less contrast between colours, then a G15 XLT lens is for you because it offers similar colour-sensitivity for the eye. Having a lower contrast lens, the visible difference in colour and brightness of objects will be dampened. Consequently the colours the thing is through these lenses will probably be natural and soft in the eyes.
The two B15 and G15 XLT lenses are constructed with impact resistant optical glass that is naturally scratch resistant. Quality and stability are remarkable and over time you will notice almost no fading whatsoever from the colour.
Polarized lenses essentially trim down the level of glare made by reflective surfaces like water or any other semi-transparent objects, and also some metallic surfaces. Glare signifies the difficulty of seeing in bright light.
Sunlight, as an example, bounces off surfaces in all directions (i.e. vertically, horizontally or diagonally). For individuals that are active inside the “horizontal plane”, it indicates that this bright sunlight bounced horizontally enters the attention within a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the street ahead of them if they’re driving in very sunny conditions (if the sun is before them).
Polarized lenses have got a laminated surface with vertical stripes that produce a filter, which effectively cuts out the horizontally-polarized light and allows only vertically-polarized light in. To put it differently, if you happen to be with a clear lake you may probably see under the surface or maybe if you’re driving, you can now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or maybe you may notice a “rainbow” effect when your car’s windows are tinted.
All 3 lenses are incredibly useful, especially the polarized ones, but count on paying reasonably limited in the sunglasses.
The lens base simply signifies the base curve or perhaps the front curve from the lens measured in “diopters”, which is actually a term that really only matters to opticians. You’ll learn that many ray ban sale 90 off have a “Lens Base 6”, which basically ensures that they’re sufficiently curved and designed to to operate as sunglasses (i.e., they cover the eyes enough).
Lens dimensions are measured in millimeters and means the length (or width) of one lens. Bear that at heart when you make a purchase. Many Ray-Ban models come in several different sizes of lens. Be sure you get the size that fits your face or maybe you may end up with a couple of aviator shades that don’t fit properly.