Ray-Ban uses four several types of lenses for their 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 about the subject (they simply can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of most UV rays and permit only 15% from the visible light to pass through through them (that’s an 85% reduction!). These brown lenses offer much more contrast by cutting down on the amount of blue light, as opposed to a G15 lens (which happens to be described within the next paragraph). Blue light is extremely easily captured from the eye and it has the outcome of softening other colours that happen to be harsher to your vision. Quite simply, by reduction of the quantity of blue light, the differences between colours and brightness of objects are definitely more pronounced.
The G15 XLT lenses have the identical 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 task was to design a lens that had been “colour neutral”; to put it differently, a lens that filters light like the human eye does. If you need a lens that provides rather less contrast between colours, then the G15 XLT lens is for you because it offers similar colour-sensitivity to the human eye. By using a lower contrast lens, the main difference in colour and brightness of objects will probably be dampened. This means that the colours the truth is with these lenses will be natural and soft in 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 also over time you will see basically no fading whatsoever in the colour.
Polarized lenses essentially cut down the quantity of glare made by reflective surfaces like water or other 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 most directions (i.e. vertically, horizontally or diagonally). For people who are active inside the “horizontal plane”, it indicates that the bright sunlight bounced horizontally enters the attention within a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the road before them if they’re driving in very sunny conditions (when the sun is prior to them).
Polarized lenses have got a laminated surface with vertical stripes that create a filter, which effectively reduces the horizontally-polarized light and allows only vertically-polarized light in. To put it differently, if you be over a clear lake it is possible to probably see beneath the surface or if perhaps you’re driving, now you can see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can become distorted or else you may notice a “rainbow” effect in case your car’s windows are tinted.
All 3 lenses are really useful, particularly the polarized ones, but anticipate paying a premium in the sunglasses.
The lens base simply signifies the base curve or maybe the front curve in the lens measured in “diopters”, which is actually a term that actually only matters to opticians. You’ll realize that many ray ban sale online have a “Lens Base 6”, which basically means that they’re sufficiently curved and created to to function as sunglasses (i.e., they cover your eye area enough).
Lens size is measured in millimeters and signifies the length (or width) of a single lens. Bear that in your mind when you make an order. Many Ray-Ban models come in several different sizes of lens. Ensure you have the size that suits the face or you may end up with a couple of aviator shades that don’t fit properly.