Gradient tint is the term used to describe a lens with a fully tinted upper portion that gradually diminishes towards the bottom. Ultimately, the bottom section of a gradient lens will be completely clear. The idea behind this type of tinting is that the uppermost portion of lens will reduce glare and UV exposure while the bottom portion of the lens simultaneously offers the wearer the convenience of a clear area for reading and/or viewing objects up close.
Some practical applications for these these lenses in the workplace include while driving or working on computers. In the instance of driving, blinding glare from the sun is reduced, while the clear bottom section of the lens allow drivers to easily see the instruments on the dash of the vehicle. In regards to computer usage, reading a bright computer screen becomes easier and not as harsh on the user's eyes. Another great benefit to putting a gradient tint in prescription safety glasses is that it is not necessary to switch to fully tinted non prescription eyewear when outdoors. This is not only convenient, but also a great deterrent to employees removing their safety eyewear.
The creation of a gradient tint is actually quite simple. A specialized machine repeatedly dips these lenses in a vertical motion into the dye while moving them up and down. The lenses are slowly and deliberately withdrawn from the dye during the dipping process. As a result, the top of the lenses are darker as they have been immersed in the dye for a longer period of time.
Some people find that eyewear with a solid tint does not provide them with the same flexibility that gradient tint offers. Having UV protection and being able to see clearly in all environments with varying light is easily achieved with the dual functionality of these lenses.