Ray-Ban uses four different kinds of lenses for their sunglasses. The B15 XLT lens, the ray ban sale, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special on them (they merely are available in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all UV rays and enable only 15% of your visible light to successfully pass through them (that’s an 85% reduction!). These brown lenses provide a little bit more contrast by lowering on the amount of blue light, rather than a G15 lens (that is described within the next paragraph). Blue light is incredibly easily captured from the eye and possesses the impact of softening other colours which can be harsher to the vision. In other words, by reducing the level of blue light, the differences between colours and brightness of objects are definitely more pronounced.
The G15 XLT lenses have a similar properties because 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 build up. The task ended up being to design a lens that was “colour neutral”; put simply, a lens that filters light much like the human eye does. If you want a lens that gives a little less contrast between colours, then the G15 XLT lens is perfect for you because it offers similar colour-sensitivity to the human eye. Having a lower contrast lens, the real difference in colour and brightness of objects will be dampened. Because of this the colours the thing is with these lenses is going to be natural and soft about the eyes.
The two B15 and G15 XLT lenses are created from impact resistant optical glass that may be naturally scratch resistant. Quality and stability are remarkable and over time you will see hardly any fading whatsoever inside the colour.
Polarized lenses essentially cut down the volume of glare produced by reflective surfaces like water or another semi-transparent objects, and in many cases some metallic surfaces. Glare refers back to 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 folks who are active inside the “horizontal plane”, it means how the bright sunlight bounced horizontally enters the eye in a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the street in front of them if they’re driving in very sunny conditions (in case the sun is in front of 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. Quite simply, should you be with a clear lake you can probably see under the surface or if you’re driving, you can now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can become distorted or maybe you may notice a “rainbow” effect in case your car’s windows are tinted.
All 3 lenses are very useful, specially the polarized ones, but expect to pay limited in the sunglasses.
The lens base simply signifies the base curve or maybe the front curve from the lens measured in “diopters”, that is a term that really only matters to opticians. You’ll discover that many ray ban usa use a “Lens Base 6”, which basically means that they’re sufficiently curved and created to to perform as sunglasses (i.e., they cover your eye area enough).
Lens dimensions are measured in millimeters and means the length (or width) of merely one lens. Bear that at heart when you make a purchase. Many Ray-Ban models come in several different sizes of lens. Make sure you obtain the size that matches the face or else you may end up with a kind of aviator shades that don’t fit properly.