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All sunglasses are not the same. Effective sunglasses should block both UVA and UVB radiation. The sunglasses must be measured to block 99% to 100% of UVA or UV400 (400 nm is the wavelength of UVA radiation). These rays are the ultraviolet parts of sunlight that can harm your eyes. |
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Remember that wearing sunglasses that don't block out these rays can be worse than not wearing any at all. |
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Look for sunglasses that are close fitting as they help stop light getting round the edges - wraparound shades and large lenses are good too. |
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Plastic lenses are often better than glass ones as they are lighter and are harder to break. They have to be maintained well as they scratch more easily then glass |
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Don't be fooled by the price - more expensive shades might be more fashionable but may not give more protection. |
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Brown, amber and grey lenses usually give better protection than other colours. |
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Dark coloured sunglasses don't necessarily protect you better. It's a special coating on the lens that makes them safe, not their darkness. |
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Ordinary sunglasses make the situation WORSE! The dark lenses cause the pupils to dilate, allowing more of the dangerous UVA radiation to damage the lens and the retina |
