Ray Ban Sale – You’ll Want To Order Affordable Sunglasses.
Ray-Ban uses four various kinds of lenses for sunglasses. The B15 XLT lens, the ray ban usa, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special on them (they just can be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of Ultra violet rays and permit only 15% of the visible light to move through them (that’s an 85% reduction!). These brown lenses provide a little more contrast by reducing on the amount of blue light, as opposed to a G15 lens (which is described in the following paragraph). Blue light is quite easily captured by the eye and contains the effect of softening other colours which can be harsher to our own vision. In other words, by reduction of the level of blue light, the differences between colours and brightness of objects are 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 the military requested Ray-Ban to produce. The task would be to design a lens that had been “colour neutral”; in other words, a lens that filters light like the human eye does. If you need a lens that provides a little less contrast between colours, then your G15 XLT lens is made for you as it offers similar colour-sensitivity for the eye. By using a lower contrast lens, the main difference in colour and brightness of objects will likely be dampened. This means that the colours you see with these lenses will probably be natural and soft in the eyes.
The two B15 and G15 XLT lenses are created from impact resistant optical glass that is certainly naturally scratch resistant. Quality and stability are remarkable and also over time you will see basically no fading whatsoever from the colour.
Polarized lenses essentially reduce the volume of glare created by reflective surfaces like water or any other semi-transparent objects, and also some metallic surfaces. Glare means the difficulty of seeing in bright light.
Sunlight, as an example, bounces off surfaces in all of the directions (i.e. vertically, horizontally or diagonally). For people who are active from the “horizontal plane”, it means that this bright sunlight bounced horizontally enters the eye within a similar fashion. This causes the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the street before them if they’re driving in very sunny conditions (when the sun is ahead of them).
Polarized lenses use a laminated surface with vertical stripes that create a filter, which effectively omits the horizontally-polarized light and allows only vertically-polarized light in. Quite simply, if you happen to be with a clear lake you can probably see within 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 maybe you may notice a “rainbow” effect in case your car’s windows are tinted.
All 3 lenses are extremely useful, particularly the polarized ones, but anticipate paying limited in the sunglasses.
The lens base simply refers to the base curve or maybe the front curve of your lens measured in “diopters”, which is a term that basically only matters to opticians. You’ll discover that many ray ban usa use a “Lens Base 6”, which basically implies that they’re sufficiently curved and made to to function as sunglasses (i.e., they cover the eyes enough).
Lens dimension is measured in millimeters and refers to the length (or width) of merely one lens. Bear that in your mind when making an investment. Many Ray-Ban models can be found in a number of sizes of lens. Be sure you have the size that suits your facial skin or perhaps you may end up with a pair of aviator shades that don’t fit properly.