Ray-Ban uses four different kinds of lenses with regard to their sunglasses. The B15 XLT lens, the ray ban sale online, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about the subject (they merely come in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the UV rays and allow only 15% of your visible light to pass through through them (that’s an 85% reduction!). These brown lenses offer much more contrast by lowering on the level of blue light, instead of a G15 lens (that is described in the following paragraph). Blue light is quite easily captured by the eye and it has the outcome of softening other colours which can be harsher to our own vision. In other words, by reduction of the level of blue light, the differences between colours and brightness of objects are more pronounced.
The G15 XLT lenses have similar properties as 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 develop. The challenge ended up being to design a lens that was “colour neutral”; quite simply, a lens that filters light much like the human eye does. If you prefer a lens that gives rather less contrast between colours, then a G15 XLT lens is made for you as it offers similar colour-sensitivity on the eye. By 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 in the eyes.
The B15 and G15 XLT lenses are created from impact resistant optical glass that is certainly naturally scratch resistant. Quality and stability are remarkable and also over time you will see basically no fading whatsoever from the colour.
Polarized lenses essentially cut down the level of glare produced by reflective surfaces like water or any other semi-transparent objects, and even some metallic surfaces. Glare means the difficulty of seeing in bright light.
Sunlight, for instance, bounces off surfaces in every directions (i.e. vertically, horizontally or diagonally). For folks who are active in the “horizontal plane”, it means how the bright sunlight bounced horizontally enters the attention within a similar fashion. This leads to the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the highway before them if they’re driving in very sunny conditions (when the sun is in front of them).
Polarized lenses have got a laminated surface with vertical stripes that create a filter, which effectively omits the horizontally-polarized light and allows only vertically-polarized light in. Put simply, if you happen to be on the clear lake you are able to probably see beneath the surface or if you’re driving, anyone can see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or you may notice a “rainbow” effect when your car’s windows are tinted.
All 3 lenses are extremely useful, in particular the polarized ones, but count on paying reduced in the sunglasses.
The lens base simply refers back to the base curve or maybe the front curve in the lens measured in “diopters”, that is a term that basically only matters to opticians. You’ll discover that many ray ban 90 off possess a “Lens Base 6”, which basically implies that they’re sufficiently curved and built to to function as sunglasses (i.e., they cover the eyes enough).
Lens size is measured in millimeters and refers back to the length (or width) of just one lens. Bear that under consideration when you make any purchase. Many Ray-Ban models may be found in a number of sizes of lens. Be sure you have the size that fits your facial skin or you may end up with a kind of aviator shades that don’t fit properly.