Sometimes wearing tinted glasses do benefits for our eyes, and different colors have different functions. If you are going to have a hiking, gray and green lenses will be helpful. Dark brown lens would be better if you are driving, dark green lens would be better when you are sitting in the sun, blue lens would be better when you are playing on the beach, mercury are fit for outdoor sports men and yellow are often used in hunting. Besides, light blue and pink lens are decorative and practical applicability. All the above mentioned benefits are outdoors, and there are no benefits indoors with colored glasses. It makes pupil dilation and visual fatigue happen easier.