Ray-Ban uses four different types of lenses with regard to 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 them (they merely may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the UV rays and let only 15% in the visible light to pass through through them (that’s an 85% reduction!). These brown lenses offer a little more contrast by reducing on the volume of blue light, rather than a G15 lens (which is described in the next paragraph). Blue light is extremely easily captured by the eye and has the impact of softening other colours that happen to be harsher to your vision. Quite simply, 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 a similar properties as 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 would be to design a lens that was “colour neutral”; quite simply, a lens that filters light such as the eye does. If you prefer a lens that gives rather less contrast between colours, then the G15 XLT lens is for you as it offers similar colour-sensitivity on the human eye. Using a lower contrast lens, the visible difference in colour and brightness of objects will likely be dampened. Because of this the colours you can see through these lenses will likely be natural and soft about the eyes.
The two B15 and G15 XLT lenses are made of impact resistant optical glass that may be naturally scratch resistant. Quality and stability are remarkable and over time you will see basically no fading whatsoever from the colour.
Polarized lenses essentially cut down the amount of glare made 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 example, bounces off surfaces in all directions (i.e. vertically, horizontally or diagonally). For those who are active in the “horizontal plane”, it means that this bright sunlight bounced horizontally enters the eye within a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the highway ahead of them if they’re driving in very sunny conditions (if the sun is in front of them).
Polarized lenses use 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, in the event you be on the clear lake you are able to probably see beneath the surface or maybe you’re driving, you can now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or else you may notice a “rainbow” effect if your car’s windows are tinted.
All 3 lenses are really useful, particularly the polarized ones, but expect to pay reasonably limited on the sunglasses.
The lens base simply refers to the base curve or even the front curve in the lens measured in “diopters”, which is actually a term that actually only matters to opticians. You’ll find that many ray ban usa use a “Lens Base 6”, which basically ensures that they’re sufficiently curved and created to to work as sunglasses (i.e., they cover the eye area enough).
Lens dimension is measured in millimeters and refers back to the length (or width) of merely one lens. Bear that at heart when you make an investment. Many Ray-Ban models may be found in a number of sizes of lens. Make sure you have the size that matches the face or you may get a kind of aviator shades that don’t fit properly.