Ray-Ban uses four various kinds 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 on them (they just can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all the UV rays and allow only 15% of the visible light to successfully pass through them (that’s an 85% reduction!). These brown lenses offer a bit more contrast by lowering on the quantity of blue light, rather than 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 which are harsher to the vision. Quite simply, 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 as the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens may be the original aviator lens how the military requested Ray-Ban to build up. The problem ended up being to design a lens which was “colour neutral”; quite simply, a lens that filters light much like the eye does. If you need a lens that offers a little less contrast between colours, then the G15 XLT lens is perfect for you since it offers similar colour-sensitivity towards the human eye. With a lower contrast lens, the visible difference in colour and brightness of objects will likely be dampened. Because of this the colours you see with these lenses will probably be natural and soft in the eyes.
Both the B15 and G15 XLT lenses are made from impact resistant optical glass which is naturally scratch resistant. Quality and stability are remarkable and also over time you will see hardly any fading whatsoever from the colour.
Polarized lenses essentially decrease the level of glare made by reflective surfaces like water or other semi-transparent objects, as well as some metallic surfaces. Glare refers to the difficulty of seeing in bright light.
Sunlight, by way of example, bounces off surfaces in all of the directions (i.e. vertically, horizontally or diagonally). For folks who are active in the “horizontal plane”, this means how the bright sunlight bounced horizontally enters the eye within a similar fashion. This leads to the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the highway prior to them if they’re driving in very sunny conditions (if the sun is in front of them).
Polarized lenses possess 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. Quite simply, in the event you be on a clear lake it is possible to probably see underneath 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 maybe you may notice a “rainbow” effect when your car’s windows are tinted.
All 3 lenses are incredibly useful, especially the polarized ones, but expect to pay a premium about the sunglasses.
The lens base simply refers to the base curve or maybe the front curve in the lens measured in “diopters”, which is a term that really only matters to opticians. You’ll discover that many ray ban 90 off use a “Lens Base 6”, which basically ensures that they’re sufficiently curved and built to to work as sunglasses (i.e., they cover your eye area enough).
Lens dimension is measured in millimeters and signifies the length (or width) of just one lens. Bear that in mind when coming up with a purchase. Many Ray-Ban models come in a number of sizes of lens. Make certain you obtain the size which fits your facial skin or you may get a couple of aviator shades that don’t fit properly.