Ray-Ban uses four different types of lenses with regard to 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 the subject (they only can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of most UV rays and allow only 15% from 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 amount of blue light, as opposed to a G15 lens (which is described within the next paragraph). Blue light is very easily captured from the eye and has the effect of softening other colours which are harsher to our vision. To put it differently, 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 identical properties as being the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens will be the original aviator lens that the military requested Ray-Ban to develop. The process was to design a lens which had been “colour neutral”; in other words, a lens that filters light much like the eye does. If you prefer a lens that offers a little less contrast between colours, then this G15 XLT lens is perfect for you mainly because it offers similar colour-sensitivity on the eye. By using a lower contrast lens, the difference in colour and brightness of objects will likely be dampened. Which means that the colours you see with these lenses will probably be natural and soft around the eyes.
The two B15 and G15 XLT lenses are made of impact resistant optical glass which is naturally scratch resistant. Quality and stability are remarkable as well as over time you will see hardly any fading whatsoever in the colour.
Polarized lenses essentially trim down the quantity of glare manufactured by reflective surfaces like water or another semi-transparent objects, and even 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 those who are active from the “horizontal plane”, it means how the bright sunlight bounced horizontally enters the eye in the similar fashion. This will cause 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 before them).
Polarized lenses have a laminated surface with vertical stripes that create a filter, which effectively reduces the horizontally-polarized light and allows only vertically-polarized light in. In other words, should you be on the clear lake you can probably see within the surface or maybe if you’re driving, you can now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays may become distorted or you may notice a “rainbow” effect when your car’s windows are tinted.
All 3 lenses are incredibly useful, specially the polarized ones, but anticipate to pay limited on the sunglasses.
The lens base simply signifies the base curve or perhaps the front curve from the lens measured in “diopters”, that is a term that basically only matters to opticians. You’ll discover that many ray ban sale have a “Lens Base 6”, which basically ensures that they’re sufficiently curved and designed 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 just one lens. Bear that in mind when you make an investment. Many Ray-Ban models are available in a number of sizes of lens. Ensure you get the size which fits your face or perhaps you may get a pair of aviator shades that don’t fit properly.