Ray-Ban uses four several types of lenses for their sunglasses. The B15 XLT lens, the ray ban sale online, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about them (they just come in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of UV rays and enable only 15% from the visible light to pass through them (that’s an 85% reduction!). These brown lenses also offer a little bit more contrast by cutting down on the volume of blue light, as opposed to a G15 lens (which can be described in the following paragraph). Blue light is incredibly easily captured from the eye and has the outcome of softening other colours that happen to be harsher to our own vision. In other words, by reduction of 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 may be the original aviator lens how the military requested Ray-Ban to develop. The problem was to design a lens that was “colour neutral”; in other words, a lens that filters light such as the human eye does. If you need a lens that gives a little less contrast between colours, then a G15 XLT lens is perfect for you as it offers similar colour-sensitivity for the eye. With a lower contrast lens, the main difference in colour and brightness of objects will likely be dampened. Because of this the colours the thing is through these lenses will likely be natural and soft on the eyes.
Both B15 and G15 XLT lenses are made from impact resistant optical glass that is naturally scratch resistant. Quality and stability are remarkable and over time you will notice almost no fading whatsoever from the colour.
Polarized lenses essentially reduce the volume of glare manufactured by reflective surfaces like water or any other semi-transparent objects, and also 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 inside the “horizontal plane”, it means how the bright sunlight bounced horizontally enters the eye in the similar fashion. This causes 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 (in the event the sun is ahead of them).
Polarized lenses use 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, if you happen to be with a clear lake you are able to probably see underneath the surface or if you’re driving, anyone can see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can get distorted or you may notice a “rainbow” effect if your car’s windows are tinted.
All 3 lenses are extremely useful, particularly the polarized ones, but anticipate paying a premium around the sunglasses.
The lens base simply means the base curve or maybe the front curve of the lens measured in “diopters”, and that is a term that basically only matters to opticians. You’ll learn that many ray ban sale have a “Lens Base 6”, which basically implies that they’re sufficiently curved and made to to operate as sunglasses (i.e., they cover your eye area enough).
Lens dimension is measured in millimeters and refers back to the length (or width) of one lens. Bear that in mind when making a purchase. Many Ray-Ban models come in several different sizes of lens. Make certain you obtain the size that fits the face or perhaps you may end up with a kind of aviator shades that don’t fit properly.