Ray-Ban uses four various kinds of lenses for 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 simply may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of Ultra violet rays and allow only 15% in the visible light to pass through through them (that’s an 85% reduction!). These brown lenses offer much more contrast by cutting down on the volume of blue light, instead of a G15 lens (which is described over the following paragraph). Blue light is very easily captured by the eye and has the result of softening other colours that are harsher to the vision. Put 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 as the B15 XLT lenses, however they’re of greyish/greenish colour. The G15 lens may be the original aviator lens that this military requested Ray-Ban to build up. The process was to design a lens that had been “colour neutral”; quite simply, a lens that filters light just like the eye does. If you prefer a lens that offers rather less contrast between colours, then the G15 XLT lens is for you because it offers similar colour-sensitivity on the eye. With a lower contrast lens, the main difference in colour and brightness of objects will likely be dampened. Which means that the colours the thing is with these lenses is going to be natural and soft in the eyes.
The 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 basically no fading whatsoever within the colour.
Polarized lenses essentially cut down the quantity of glare manufactured by reflective surfaces like water or any other semi-transparent objects, and even some metallic surfaces. Glare refers to the difficulty of seeing in bright light.
Sunlight, for example, bounces off surfaces in all of the directions (i.e. vertically, horizontally or diagonally). For individuals that are active within the “horizontal plane”, it indicates that this bright sunlight bounced horizontally enters the eye in the similar fashion. This leads to 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 possess a laminated surface with vertical stripes that create a filter, which effectively reduces the horizontally-polarized light and allows only vertically-polarized light in. Put simply, if you happen to be on a clear lake you can probably see within the surface or if perhaps you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays can get distorted or else you may notice a “rainbow” effect when your car’s windows are tinted.
All 3 lenses are very useful, especially the polarized ones, but count on paying reasonably limited about the sunglasses.
The lens base simply means the base curve or the front curve from the lens measured in “diopters”, and that is a term that basically only matters to opticians. You’ll find that many cheap ray ban sale have a “Lens Base 6”, which basically ensures that they’re sufficiently curved and created to to function as sunglasses (i.e., they cover the eye area enough).
Lens dimensions are measured in millimeters and refers back to the length (or width) of one lens. Bear that at heart when making any purchase. Many Ray-Ban models may be found in many different sizes of lens. Be sure you receive the size which fits the face or else you may get a set of aviator shades that don’t fit properly.