Does pupil dilation from wearing sunglasses cause UV problems for the eye?
The small amount of pupil dilation in the eye, due to the wearing of sunglasses, is not known to cause any problems. All sunglasses absorb UV more strongly than visible light. They reduce the UV more than if you were to stand in the shade, since the shade more or less evenly attenuates all wavelengths, visible and UV, while sunglasses preferentially attenuate shorter wavelengths i.e., UV wavelengths. Therefore, sunglasses actually provide substantially more UV reduction than the shade. Wearing a pair of sunglasses does not increase your exposure to UV radiation nor does standing in the shade. This idea is a myth! 4. Should sunglasses be worn for driving? Sunglasses are the favorite “necessary accessory” worn by drivers to reduce glare and increase comfort during driving. Under bright conditions sunglasses are very helpful to drivers to reduce the brightness and glare, thereby allowing better vision under those driving conditions. 5. Can sunglasses be worn at night? Sunglasses should no
