With weather getting warm, plans for vocation in early spring should be placed on agenda. Then a pair of polarized sunglasses must be a necessary accessory, and if you have myopia or hyperopia, prescription polarized sunglasses of different colors are strongly recommended.
The so called prescription polarized sunglass is a great combination of prescription glass, polarized glass and sunglass, which can be easily observed from the name. It indicates that, wearing prescription polarized sunglasses, without contact lenses, you could get a clear vision and at the same time keep your eyes from both harmful sun rays and reflections from water and mirror, etc.. Isn’t is a good way to kill more two birds with one stone?
Then, when choosing prescription polarized sunglasses by color, you must feel dizzy, for there are really a great many kinds of colors. Which kind should you choose?
The first principle people notice when choosing the color of sunglasses should probably be whether it matches with their skin colors or not. However, apart from this principle, for the goodness to your eyes, you should choose the color of sunglasses according to the function each has.
As for the color depths, they can be divided into that of 15%, 34%, 50% and 70%. The darker the lenses are, the more visible light will be absorbed, but the color depths are irrelevant to the capacity to block ultraviolet radiation, which is merely related to materials of the lenses.
The functions vary from one color to another. Gray lenses can absorb any kind of color spectrum, therefore, no aberration will be produced. Vision for gray sunglass wearers will merely get darker. Coffee lenses are able to eliminate a great many of blue light which could improve the sharpness of vision, so sunglasses with coffee lenses are suitable to be worn in environment where air pollution is severe. Green lenses, similar to gray lenses, are capable to increase the green light reaching to eyes, which would bring cool feeling to the wearers. Yellow lenses are also called night vision lenses. They are hardly able to increase visible light, but instead improve contrast ratio. Thus sunglasses with yellow lenses are strictly not included in sunglasses. They are more preferred to be referred as night vision glasses.
Then, with the above knowledge, facing prescription polarized sunglasses of different colors, you could choose the right color and depths of that suitable to your lives most. Just have a try.
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