Ophthalmologist, Gandhinagar
•
12 years experience
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Which of the following may sunglasses provide protection from?
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Sunglasses protect the eyes from cataracts (clouding of lenses leading to blurriness), caused mostly by excessive exposure to UV radiation, pterygium (tissue growth over lenses leading to astigmatism) and reddening of the white region of the eyes.
Which of the following lenses provide the best kind protection to your eyes?
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Sunglasses with larger frames, and often wraparound styles, help protect your eyes from the harmful UV radiations of the sun in a higher degree than smaller lenses or close- fitting glasses. Polarized lenses go a long way in reducing glare, especially in snowy areas or beaches. However, they cannot provide adequate UV protection. Though many see clearly through them, looking at closer objects, such as computer screens or smart- phones may become harder to see.
Sunglasses aren't necessary on cloudy days
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This is a complete misconception harbored by a number of people; to think that sunglasses aren't necessary on cloudy days. The harmful ultraviolet radiation of the sun is as potent on a cloudy day as on any other clear day. Proper skin and eye protection is imperative in this regard.
Prolonged exposure to the ultraviolet and 'blue-light' spectrum of the sun's rays can prove to be detrimental to eye health, and may often lead to macular degeneration (an eye disorder that may lead to loss of vision) in some extreme cases.
Darker sunglasses provide greater UV protection than the lighter once
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Contrary to popular belief, the color of the shades you wear hardly have any effect on the UV radiation entering your eyes. Just because it is darker, does not necessarily mean that your eyes are better protected. Often, when you wear darker sunglasses, your pupil widens, leading to a higher amount of light entering the eyes, and with it, more UV radiations. UV protection comes from wearing sunglasses which are equipped with anti-UV ray lenses. Hence, it is advisable to be careful while purchasing the same.