Posted by
ella solo on Thursday, September 17, 2009 1:45:18 AM
People think of sun protection as skin protection, seldom have eye
protection in mind. In fact, studies have shown that ultraviolet
radiation will lead to keratitis, cataracts, retinal damage and other
eye diseases. Thus, delicate eyes need our special care in heat summer
days.
Please don't look up into the sun. Eyes are very fragile.
Short-time direct view to sun may result in transient giddiness.
Long-term direct view to sunlight will cause pain, tears, inflammation
and blurred vision and even hurt retina.
It is well known that
eyes are the most sensitive part to the ultraviolet radiation and they
can widely absorb UV rays of different wavelengths. The UV ray of 280nm
wavelength damages the cornea most badly and it brings about the
conjunctivitis. The UV rays with the wavelength of 290-400nm are
harmful to lens, which would result in cataract. Research indicates the
risk to suffer from cataract rises by 10% if one more hour every day
people expose to the sun. Well then, I'd like to tell you some
preventive measures.
Wear hat or raise a parasol when you are outing. At the same time you can wear
eye glasses which are also effective in protecting eyes from sunshine. It's important to note that the
prescription glasses
should be good in respect of quality. If you buy schlock sunglasses,
instead of protecting eyes, you are doing harm to your eyes. You'd
better choose a pair of quality sunglasses that can block UV rays. It
has been shown in much medical research that sunglasses of neutral
density glass with grey lenses are best in blocking UV rays. People
wearing contact lenses can buy UV-protective ones which are able to
block 90% ultraviolet radiation. It would be safer to add a pair of
glasses frames. The sun is strongest at noon, which is harmful to both your skin and eyes. You'd better stay at home without going out.
Plastic glasses frames are extremely lightweight and durable. Its skin-care feature prevents skin from allergy. In addition,
plastic eyewear exists in many colors, so such
plastic eyeglasses never fade. Another great advantage is that a pair of eyeglass frames can present two or more colors, making your eyeglasses fashionable and unique.