The main task of sunglasses is to protect the eyes of their owner and make his stay in conditions of wind, sun or bright light as comfortable as possible. That is why the lens color is one of the major characteristics during the selection of the sun glasses.
Filters of particular color influence on the photoreceptors of the eyes, intensifying ones and weakening the others. Glasses with red, pink or blue color lens can look rather exotic but they distort the color scale. As a result, when wearing such glasses, the eyes get tired faster, making you feel irritated.
The safest and most correct lens colors are brown, grey and green colors. Green and grey lens have a calming effect on eye receptors and provide the most realistic rendering of the surrounding medium. The glasses with brown lens are considered the most comfortable for long wearing.
Orange and yellow glasses can make the dull day seem brighter, however its better to avoid wearing them for a long time on a sunny day. It is considered that such lenses are optimal for drivers, as they enhance visibility on the road and reduce the dazzling effect of headlights and spot-lights.
The scientists have not reached a common ground on the influence of gradients on the comfortable wearing of the spectacles. That is why it is recommended to trust your personal sensations, as some people say that non-uniform darkness rate makes them feel exhausted.
It is important to pay attention not only to the lens color but also to the darkness rate. For example, if you are looking for sunglasses for day-to-day use in the city, opt for those with up to 60% darkness rate, but if you need glasses for the mountains of the seaside, check the ones with the maximal rate of 80%.
No matter which lenses you will select, remember that it is always better to buy original sunglasses made by reliable companies.