Ray-Ban uses four different kinds of lenses for their sunglasses. The B15 XLT lens, the cheap ray ban sale, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about the subject (they only are available in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of most UV rays and allow only 15% in the visible light to pass through them (that’s an 85% reduction!). These brown lenses also offer a little more contrast by lowering on the level of blue light, rather than a G15 lens (which happens to be described within the next paragraph). Blue light is incredibly easily captured by the eye and has the outcome of softening other colours that are harsher to our own vision. Quite simply, by reducing the volume of blue light, the differences between colours and brightness of objects are more pronounced.
The G15 XLT lenses have the same properties as being the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens will be the original aviator lens that this military requested Ray-Ban to produce. The process was to design a lens which was “colour neutral”; in other words, a lens that filters light like the eye does. If you want a lens which offers rather less contrast between colours, then the G15 XLT lens is for you as it offers similar colour-sensitivity to the eye. Having a lower contrast lens, the main difference in colour and brightness of objects will probably be dampened. Because of this the colours the truth is with these lenses will likely be natural and soft on the eyes.
Both 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 over time you will notice almost no fading whatsoever inside the colour.
Polarized lenses essentially decrease the quantity of glare created by reflective surfaces like water or other semi-transparent objects, and also some metallic surfaces. Glare means the difficulty of seeing in bright light.
Sunlight, for example, bounces off surfaces in all directions (i.e. vertically, horizontally or diagonally). For individuals that are active from the “horizontal plane”, it means how the bright sunlight bounced horizontally enters the attention within a similar fashion. This will cause 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 (when 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. Quite simply, if you happen to be on a clear lake you are able to probably see within the surface or if perhaps you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or you may notice a “rainbow” effect if your car’s windows are tinted.
All 3 lenses are really useful, especially the polarized ones, but expect to pay reasonably limited about the sunglasses.
The lens base simply means the base curve or perhaps the front curve in the lens measured in “diopters”, which is a term that truly only matters to opticians. You’ll discover that many ray ban sale 90 off 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 eye area enough).
Lens dimensions are measured in millimeters and refers to the length (or width) of a single lens. Bear that in your mind when you make an investment. Many Ray-Ban models can be found in a number of different sizes of lens. Make sure you obtain the size which fits your facial skin or maybe you may end up with a couple of aviator shades that don’t fit properly.