Ray-Ban uses four different types of lenses for sunglasses. The B15 XLT lens, the ray ban sale 90 off, polarized lenses and normal lenses, which we won’t discuss here because there’s nothing special about the subject (they merely may be found in different colours).
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of most 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 cutting down on the level of blue light, rather than a G15 lens (which is described within the next paragraph). Blue light is extremely easily captured from the eye and possesses the result of softening other colours which are harsher to your vision. Put simply, by reducing the quantity 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 is definitely the original aviator lens that the military requested Ray-Ban to build up. The problem would be to design a lens that was “colour neutral”; put simply, a lens that filters light much like the human eye does. Should you prefer a lens that gives a little less contrast between colours, then a G15 XLT lens is perfect for you since it offers similar colour-sensitivity for the human eye. Using a lower contrast lens, the visible difference in colour and brightness of objects will likely be dampened. Consequently the colours you can see through these lenses will be natural and soft in the eyes.
The two B15 and G15 XLT lenses are created from impact resistant optical glass that is naturally scratch resistant. Quality and stability are remarkable and over time you will see almost no fading whatsoever within the colour.
Polarized lenses essentially decrease the level of glare created by reflective surfaces like water or some other semi-transparent objects, and even some metallic surfaces. Glare refers to the difficulty of seeing in bright light.
Sunlight, for instance, bounces off surfaces in every directions (i.e. vertically, horizontally or diagonally). For people who are active in the “horizontal plane”, it indicates how the bright sunlight bounced horizontally enters the attention in a similar fashion. This leads to the pupils to constrict and significantly reduce contrast. That’s why drivers have difficulty seeing the path before them if they’re driving in very sunny conditions (when the sun is in front of 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, in the event you be on the clear lake you can probably see under the surface or if perhaps you’re driving, you may now see ray1ban road ahead.
Some limitations to polarized lenses are that LCD displays could become distorted or maybe you may notice a “rainbow” effect in case your car’s windows are tinted.
All 3 lenses are incredibly useful, particularly the polarized ones, but expect to pay reduced on the sunglasses.
The lens base simply refers back to the base curve or the front curve of the lens measured in “diopters”, and that is a term that truly only matters to opticians. You’ll learn that many ray ban 90 off possess a “Lens Base 6”, which basically implies that they’re sufficiently curved and made to to work as sunglasses (i.e., they cover your eyes enough).
Lens dimension is measured in millimeters and signifies the length (or width) of merely one lens. Bear that in mind when you make an order. Many Ray-Ban models come in a number of different sizes of lens. Make certain you obtain the size that fits the face or maybe you may end up with a couple of aviator shades that don’t fit properly.