The first thing that comes to mind when one thinks of sun protection is to protect skin, hardly think of protecting eyes. In practice, researches indicate that eyes exposure to ultraviolet radiation will do injury and even cause diseases to eyes. and we must pay attention to the sun-proof for eyes as well.
Do not look straightly at the sun in the hot climate. Eyes are very fragile, Direct view to sun for a while may lead to temporary giddiness. Direct view to sun for a long time may bring about damage to eye and retina, accompanied with pain, tears, inflammation and blurred vision.
It is believed eyes are the most sensitive part to the UV rays; they can absorb a broad range of wavelengths of ultraviolet rays. Among them, the UV rays with 280nm wavelength are most harmful to the cornea and even cause conjunctivitis. The 290-400nm wavelength ones are prone to hurt lens and cause cataract.
Studies indexes that one more hour every day you expose to the sunlight, the 10% more possibility you may get cataract. Then what should we do in preventing the harm?
Wear coat, hat and eyeglasses when outing, which is good for your skin as well as your delicate eyes. You should pay attention to the quality of your sunglasses and ensure that they must be of high quality. If it is a pair of inferior glasses simply covered by a colour, contrary to the function of protection from the sun, it will lead to pupil dilatation, which is a bigger harm to our eyes.
glasses online with UV resistance is a good option in spring and summer. It has been shown in much medical research that sunglasses of neutral density glass with grey lenses are best in blocking UV rays. People who wear contact lenses can choose contact lenses with anti-UV function, which can filter out 90% of the UV. Your eyes will be safer if you add a pair of prescription eyeglasses .
It’s best to avoid going out at noon when the sun is very strong and much harmful to our skin and eyes.