Ray-Ban uses 4 differing types of lenses for their sunglasses. The B15 XLT lens, the G15 XLT lens, polarized lenses and ordinary lenses, which we won't talk about listed here since you can find almost nothing special about them (They only occur in several colours).
B15 XLT Lens
Ray-Ban B15 XLT lenses are brownish in colour, block 100% of all UV rays and permit only fifteen% of your obvious light to go through them (that is an 85% reduction!). These brown lenses also give you a bit much more distinction by cutting down on the amount of blue light-weight, versus a G15 lens (which is explained in the subsequent paragraph). Blue mild is quite effortlessly captured by the eye and has the effect of softening other colours that happen to be harsher to our vision. To paraphrase, by lessening the quantity of blue light-weight, the discrepancies between colors and brightness of objects are more pronounced.
G15 XLT Lens
The G15 XLT lenses possess the same Qualities as being the B15 XLT lenses, even so They are of greyish/greenish colour. The G15 lens is the initial aviator lens the military requested Ray-Ban to acquire. The obstacle was to style a lens that was "colour neutral"; To paraphrase, a lens that filters light-weight such as the human eye does. If you want a lens that offers rather less contrast among colours, then the G15 XLT lens is for you mainly because it features similar colour-sensitivity into the human eye. That has a decrease contrast lens, the main difference in colour and brightness of objects are going to be dampened. This means that the colours the thing is by means of these lenses will likely be organic and delicate around the eyes.
Both of those the B15 and G15 XLT lenses are made of effects resistant optical glass that is naturally scratch resistant. High-quality and balance are extraordinary and after a while you can recognize pretty much no fading in any respect during the colour.
Polarized Lens
Polarized lenses primarily Slash down the amount of glare produced by reflective surfaces like h2o or other semi-transparent objects, and in some cases some metallic surfaces. Glare refers to The issue of seeing in brilliant gentle.
Sunlight, one example is, bounces off surfaces in all Instructions (i.e. vertically, horizontally or diagonally). For people who find themselves Energetic from the "horizontal aircraft", it means that the bright daylight bounced horizontally enters the attention in the same manner. This causes the pupils to constrict and substantially decrease distinction. This is exactly why drivers have difficulty seeing the highway forward of these whenever they're driving in really sunny circumstances (When the Solar is forward of these).
Polarized lenses have a laminated surface with vertical stripes that develop a filter, which effectively cuts out the horizontally-polarized mild and lets only vertically-polarized light-weight in. Quite simply, if you transpire to become on a clear lake you could most likely see under the surface area or should you be driving, you can now see the road in advance.
Some limits to polarized lenses are that Liquid crystal display shows may perhaps become distorted or you might observe a "rainbow" result if your car's Home windows are tinted.
All 3 lenses are quite helpful, especially the polarized kinds, but hope to pay for a top quality about the sunglasses.
Lens Foundation
The lens base simply refers back to the base curve or the front curve from the lens calculated in "diopters", that's a phrase that basically only matters to opticians. You will discover that lots of Ray-Ban aviators Have got a "Lens Base 6", which in essence implies that they are adequately curved and intended to to operate as sun shades (i.e., they protect the eyes sufficient).
Lens Dimensions
Lens size is measured in millimeters and refers to the size (or width) of 1 lens. Bear that in your mind when creating a acquire. Quite a few Ray-Ban designs are available in many unique measurements of lens. Ensure you get the dimensions that fits your experience or it's possible you'll end up having a set of aviator shades that don't suit effectively.
Some Ray-Ban sunglasses have lens sizes which are designated as extra small, small, etc. This really is typical for models that don't resemble traditional glasses with two lenses. These sun shades Possess a "uni-lens" style, exactly where the lenses are related Astigmatism colored contacts seamlessly throughout the bridge. For this reason, regular sizing is just not relevant. These shades are to get a significant style glance.