Ray-Ban uses four different kinds of lenses for sunglasses. The B15 XLT lens, the ray ban sale 90 off, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special on them (they merely come in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the Ultra violet rays and let only 15% in the visible light to move through them (that’s an 85% reduction!). These brown lenses provide much more contrast by cutting down on the volume of blue light, rather than a G15 lens (which can be described in the following paragraph). Blue light is incredibly easily captured with the eye and possesses the impact of softening other colours that are harsher to your vision. In other words, by reducing the amount of blue light, the differences between colours and brightness of objects will be 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 the military requested Ray-Ban to produce. The challenge would be to design a lens which had been “colour neutral”; in other words, a lens that filters light just like the human eye does. If you want a lens that offers rather less contrast between colours, then a G15 XLT lens is for you mainly because it offers similar colour-sensitivity for the eye. Using a lower contrast lens, the main difference in colour and brightness of objects will probably be dampened. Which means that the colours you see through these lenses will likely be natural and soft on the eyes.
Both B15 and G15 XLT lenses are constructed with impact resistant optical glass that is naturally scratch resistant. Quality and stability are remarkable and over time you will see basically no fading whatsoever inside the colour.
Polarized lenses essentially cut down the volume of glare manufactured by reflective surfaces like water or another semi-transparent objects, as well as some metallic surfaces. Glare signifies the difficulty of seeing in bright light.
Sunlight, for instance, bounces off surfaces in most directions (i.e. vertically, horizontally or diagonally). For people who are active inside the “horizontal plane”, this means how the bright sunlight bounced horizontally enters the attention in a similar fashion. This leads to the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the path prior to them if they’re driving in very sunny conditions (in case the sun is prior to them).
Polarized lenses have 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. To put it differently, if you happen to be over a clear lake it is possible to probably see under the surface or maybe if you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays may become distorted or else you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are incredibly useful, in particular the polarized ones, but anticipate paying limited around the sunglasses.
The lens base simply refers to the base curve or even 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 sale 90 off use a “Lens Base 6”, which basically means that they’re sufficiently curved and built to to work as sunglasses (i.e., they cover the eye area enough).
Lens dimension is measured in millimeters and refers to the length (or width) of one lens. Bear that at heart when you make an investment. Many Ray-Ban models may be found in several different sizes of lens. Make certain you get the size that fits your face or you may get a couple of aviator shades that don’t fit properly.