Ray-Ban utilizes four differing types of lenses for their sunglasses. The B15 XLT lens, the G15 XLT lens, polarized lenses and ordinary lenses, which we can't talk about right here for the reason that there's nothing at all Exclusive about them (They simply appear in numerous colours).
B15 XLT Lens
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all UV rays and permit only 15% from the noticeable light to go through them (that's an eighty five% reduction!). These brown lenses also present you with a little bit much more distinction by cutting down on the amount of blue gentle, versus a G15 lens (and that is described in the next paragraph). Blue gentle is extremely easily captured by the eye and it has the impact of softening other colours which are harsher to our vision. Put simply, by lessening the amount of blue light-weight, the variances between colours and brightness of objects are more pronounced.
G15 XLT Lens
The G15 XLT lenses provide the exact same Homes given that the B15 XLT lenses, nevertheless they're of greyish/greenish colour. The G15 lens is the initial aviator lens the military services asked for Ray-Ban to establish. The obstacle was to design a lens that was "colour neutral"; Basically, a lens that filters light-weight just like the human eye does. If you'd like a lens that provides rather less distinction amongst colours, then the G15 XLT lens is for you mainly because it features very similar colour-sensitivity to your human eye. By using a reduced distinction lens, the primary difference in colour and brightness of objects are going to be dampened. Which means the colours the thing is by these lenses will likely be natural and comfortable around the eyes.
Both of those the B15 and G15 XLT lenses are made of impression resistant optical glass that is naturally scratch resistant. Good quality and stability are exceptional and eventually you'll observe virtually no fading in any way while in the colour.
Polarized Lens
Polarized lenses fundamentally Slash down the level of glare made by reflective surfaces like h2o or other semi-clear objects, as well as some metallic surfaces. Glare refers to the difficulty of seeing in bright light-weight.
Daylight, one example is, bounces off surfaces in all Instructions (i.e. vertically, horizontally or diagonally). For people who are Lively during the "horizontal aircraft", it means that the brilliant sunlight bounced horizontally enters the eye in an analogous trend. This triggers the pupils to constrict and considerably reduce distinction. That is why motorists have issues seeing the street in advance of them whenever they're driving in really sunny conditions (If your Sunlight is forward of these).
Polarized lenses Have a very laminated area with vertical stripes that create a filter, which properly cuts out the horizontally-polarized light-weight and enables only vertically-polarized mild in. To paraphrase, should you transpire to be on a transparent lake you'll be able to in all probability see underneath the area or in case you are driving, you can now see the highway in advance.
Some constraints to polarized lenses are that LCD displays might become distorted or you could recognize a "rainbow" effect if your automobile's windows are tinted.
All three lenses are certainly valuable, specifically the polarized ones, but expect to pay a top quality about the sunglasses.
Lens Base
The lens foundation just refers back to the base curve or perhaps the entrance curve on the lens calculated in "diopters", that's a time period that actually only issues to opticians. You'll find a large number of Ray-Ban aviators have a "Lens Base 6", which mainly implies that they're adequately curved and meant to to operate as sunglasses (i.e., they go over the eyes more than enough).
Lens Size
Lens dimension is measured in millimeters and refers to the length (or width) of one lens. Bear that in mind when earning a purchase. Numerous Ray-Ban types are available several different sizes of lens. Make sure you get the scale that fits your encounter or you could end up with a set of aviator shades that don't match correctly.
Some Ray-Ban sun shades have lens measurements which can be selected as more modest, little, etcetera. That is popular for designs that do not resemble common glasses with two lenses. These sun shades Possess a "uni-lens" style and design, in which the lenses are related seamlessly through the brown lenses bridge. For that reason, common sizing isn't applicable. These shades are for your high style glance.