Ray-Ban uses four different kinds of lenses for 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 merely can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all Ultra violet rays and permit only 15% of the visible light to successfully pass through them (that’s an 85% reduction!). These brown lenses also provide a bit more contrast by lowering on the quantity of blue light, instead of a G15 lens (which is described within the next paragraph). Blue light is incredibly easily captured with the eye and it has the result of softening other colours that happen to be harsher to our own vision. To put it differently, by reducing the volume of blue light, the differences between colours and brightness of objects will be more pronounced.
The G15 XLT lenses have a similar properties since the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens may be the original aviator lens the military requested Ray-Ban to produce. The challenge ended up being to design a lens which was “colour neutral”; put simply, a lens that filters light such as the human eye does. If you want a lens which offers rather less contrast between colours, then this G15 XLT lens is made for you mainly because it offers similar colour-sensitivity on the human eye. With a lower contrast lens, the difference in colour and brightness of objects will be dampened. Consequently the colours the truth is through these lenses will likely be natural and soft on the eyes.
Both the 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 notice hardly any fading whatsoever from the colour.
Polarized lenses essentially trim down the level of glare manufactured by reflective surfaces like water or any other semi-transparent objects, as well as some metallic surfaces. Glare refers back to the difficulty of seeing in bright light.
Sunlight, as an example, bounces off surfaces in most directions (i.e. vertically, horizontally or diagonally). For folks who are active within the “horizontal plane”, this means the bright sunlight bounced horizontally enters the attention inside a similar fashion. This causes 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 ahead of them).
Polarized lenses possess a laminated surface with vertical stripes that produce a filter, which effectively reduces the horizontally-polarized light and allows only vertically-polarized light in. To put it differently, in the event you be over a clear lake you may probably see beneath the surface or maybe if you’re driving, now you can see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can get distorted or else you may notice a “rainbow” effect if your car’s windows are tinted.
All 3 lenses are really useful, especially the polarized ones, but count on paying reasonably limited on the sunglasses.
The lens base simply refers to the base curve or maybe the front curve of your lens measured in “diopters”, which is actually a term that actually only matters to opticians. You’ll find that many ray ban sale 90 off possess a “Lens Base 6”, which basically implies that they’re sufficiently curved and made to to work as sunglasses (i.e., they cover the eyes enough).
Lens dimensions are measured in millimeters and refers back to the length (or width) of merely one lens. Bear that in your mind when making an order. Many Ray-Ban models come in a number of sizes of lens. Make sure you receive the size that suits your skin or maybe you may end up with a couple of aviator shades that don’t fit properly.