Ray-Ban uses four different kinds of lenses for his or her sunglasses. The B15 XLT lens, the cheap ray ban sale, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about the subject (they just are available in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of most Ultra violet rays and permit only 15% from the visible light to move through them (that’s an 85% reduction!). These brown lenses also offer much more contrast by reducing on the volume of blue light, as opposed to a G15 lens (which can be described in the following paragraph). Blue light is quite easily captured with the eye and it has the effect of softening other colours that are harsher to our own vision. Quite simply, by reduction of the level of blue light, the differences between colours and brightness of objects tend to be more pronounced.
The G15 XLT lenses have 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 develop. The task would be to design a lens that was “colour neutral”; put simply, a lens that filters light just like the eye does. If you prefer a lens that gives rather less contrast between colours, then your G15 XLT lens is designed for you because it offers similar colour-sensitivity to the human eye. By using a lower contrast lens, the visible difference in colour and brightness of objects will likely be dampened. Because of this the colours the thing is with these lenses will likely be natural and soft about the eyes.
Both the B15 and G15 XLT lenses are created from impact resistant optical glass that may be naturally scratch resistant. Quality and stability are remarkable as well as over time you will see basically no fading whatsoever within the colour.
Polarized lenses essentially decrease the level of glare manufactured by reflective surfaces like water or any other semi-transparent objects, and in many cases some metallic surfaces. Glare means 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 individuals that are active from the “horizontal plane”, this means how the bright sunlight bounced horizontally enters the attention within a similar fashion. This will cause the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the highway 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. Put simply, should you be on the clear lake you are able to probably see under the surface or maybe if you’re driving, anyone can see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can get distorted or perhaps you may notice a “rainbow” effect should your car’s windows are tinted.
All 3 lenses are really useful, particularly the polarized ones, but anticipate to pay limited around the sunglasses.
The lens base simply refers back to the base curve or perhaps the front curve of the lens measured in “diopters”, that is a term that really only matters to opticians. You’ll learn that many cheap ray ban sale possess a “Lens Base 6”, which basically implies that they’re sufficiently curved and built to to function as sunglasses (i.e., they cover the 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 creating an investment. Many Ray-Ban models can be found in several different sizes of lens. Ensure you have the size that fits your face or else you may end up with a couple of aviator shades that don’t fit properly.