Ray-Ban uses four various kinds of lenses for their sunglasses. The B15 XLT lens, the ray ban 90 off, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about them (they merely may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of UV rays and permit only 15% in the visible light to move through them (that’s an 85% reduction!). These brown lenses also provide a little more contrast by reducing on the volume of blue light, rather than a G15 lens (that is described in the following paragraph). Blue light is very easily captured from the eye and contains the impact of softening other colours which can be harsher to our own vision. Quite simply, by reducing the amount of blue light, the differences between colours and brightness of objects are definitely more pronounced.
The G15 XLT lenses have the same properties because the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens will be the original aviator lens how the military requested Ray-Ban to produce. The problem would be to design a lens which had been “colour neutral”; put simply, a lens that filters light such as the eye does. If you prefer a lens that gives a little less contrast between colours, then this G15 XLT lens is perfect for you mainly because it offers similar colour-sensitivity towards the human eye. Having a lower contrast lens, the main difference in colour and brightness of objects will be dampened. Because of this the colours you can see with these lenses is going to be natural and soft in the eyes.
Both the B15 and G15 XLT lenses are made from impact resistant optical glass that is certainly naturally scratch resistant. Quality and stability are remarkable and also over time you will see virtually no fading whatsoever within the colour.
Polarized lenses essentially reduce the volume of glare produced by reflective surfaces like water or any other semi-transparent objects, as well as some metallic surfaces. Glare signifies the difficulty of seeing in bright light.
Sunlight, by way of example, bounces off surfaces in all directions (i.e. vertically, horizontally or diagonally). For people who are active from the “horizontal plane”, it indicates how the bright sunlight bounced horizontally enters the eye inside a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the street prior to them if they’re driving in very sunny conditions (in the event the sun is in front of them).
Polarized lenses possess a laminated surface with vertical stripes that produce 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 on a clear lake you are able to probably see beneath the surface or maybe if you’re driving, you can now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or perhaps you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are extremely useful, especially the polarized ones, but anticipate to pay limited around the sunglasses.
The lens base simply signifies the base curve or the front curve in the lens measured in “diopters”, and that is a term that truly only matters to opticians. You’ll discover that many ray ban sale 90 off have got a “Lens Base 6”, which basically means that they’re sufficiently curved and created to to function as sunglasses (i.e., they cover the eye area enough).
Lens size is measured in millimeters and refers back to the length (or width) of a single lens. Bear that at heart when coming up with an order. Many Ray-Ban models may be found in several different sizes of lens. Make certain you have the size that fits your facial skin or perhaps you may end up with a set of aviator shades that don’t fit properly.