If you have vision problems such as nearsightedness
The prescription sunglasses combine the function of prescription glasses and sunglasses. You can see things clearly and give your eyes perfect protection. They protect your eyes from harmful ultra violet radiation. Everyone should wear protection with quality prescription sunglasses including children. The sun's UV rays are too strong to go without eye protection, even on days when the sun is not brightest. So for our own sake, it is necessary to take prescription sunglasses to protect your eyes.
You can buy cheap prescription sunglasses. They are also stylish and manufactured in different styles and colors. As for the colors, different colors have different features. Grey lenses can absorb any kind of color spectrum. Therefore, no deviation will be produced. Coffee lenses are able to eliminate a great many of blue light which could improve the sharpness of vision.
There exist some other bright colors lenses as well like green, yellow and so on. Green lenses, similar to grey 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. Different colors are suitable on different conditions. You can select them according to own demands. There are various cheap prescription sunglasses available for you to choose from.