Ray-Ban uses four different types 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 merely may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the Ultra violet rays and let only 15% of the visible light to pass through through them (that’s an 85% reduction!). These brown lenses provide a little more contrast by cutting down on the volume of blue light, instead of a G15 lens (that is described in the following paragraph). Blue light is quite easily captured through the eye and contains the impact of softening other colours that happen to be harsher to our vision. In other words, by reducing the quantity of blue light, the differences between colours and brightness of objects are definitely 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 that this military requested Ray-Ban to formulate. The process ended up being to design a lens that had been “colour neutral”; quite simply, a lens that filters light such as the eye does. If you prefer a lens that provides rather less contrast between colours, then the G15 XLT lens is made for you because it offers similar colour-sensitivity on the human eye. Using a lower contrast lens, the real difference in colour and brightness of objects will likely be dampened. This means that the colours you see through these lenses will probably be natural and soft around the eyes.
Both 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 almost no fading whatsoever within the colour.
Polarized lenses essentially reduce the volume of glare produced by reflective surfaces like water or another semi-transparent objects, as well as some metallic surfaces. Glare means the difficulty of seeing in bright light.
Sunlight, for instance, bounces off surfaces in all of the directions (i.e. vertically, horizontally or diagonally). For individuals that are active inside the “horizontal plane”, it implies how the 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 (if the sun is prior to them).
Polarized lenses use a laminated surface with vertical stripes that create a filter, which effectively cuts out the horizontally-polarized light and allows only vertically-polarized light in. Quite simply, in the event you be over a clear lake you are able to probably see within 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 maybe you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are very useful, specially the polarized ones, but anticipate paying reasonably limited around the sunglasses.
The lens base simply signifies the base curve or the front curve of the lens measured in “diopters”, which is actually a term that really only matters to opticians. You’ll find that many ray ban usa use a “Lens Base 6”, which basically means that they’re sufficiently curved and created to to perform as sunglasses (i.e., they cover your eye area enough).
Lens dimension is measured in millimeters and signifies the length (or width) of one lens. Bear that in your mind when making an order. Many Ray-Ban models are available in a number of different sizes of lens. Make certain you get the size that fits your skin or else you may end up with a pair of aviator shades that don’t fit properly.