In the summer , everyone will wear sunglasses to protect their eyes, i also want to buy a pair of one, but there are many different colors to choose, i do not know which one to select? All of them are the same efficent?

Accurately，different color has different effect. e.g. Brown and amber tints reduce glare, including the glare created by the blue frequency in sunlight. Gray glasses tints reduce brightness, but do not distort color.Yellow lens tints reduce the haze from blue light better than browns, so they really sharpen up the view, but they cause more color distortion. Green tinted lenses reduce glare and help filter out some of the blue light. They provide good contrast between objects. Rose colored prescription sunglasses might be a good choice if you participate in some outdoor activities, as they provide good contrast for objects viewed against backgrounds of blue or green.More information,I recommend you www.prescriptionglassesonline.net