Speaking of sun protection in summer, everyone would pay attention to their skin, few remember eyes. As a matter of fact, researches show that eyes are sensitive to UV rays which would do harm to eyes and cause eyes diseases. Hence, for health sake, eyes deserve our special attention.
Don't look directly into the sun. Delicate eyes are easily hurt.Short-time direct view to sun may result in transient 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.
As everyone knows, eyes are sensitive to bright sunlight and can absorb ultraviolet radiation of any kinds. The ultraviolet radiation with 280nm wavelength does the most damage to the cornea, and it is the cause of conjunctivitis. The ultraviolet radiation with 290-400nm wavelength causes great damage to the lens, and it is also the cause of cataract.Studies suggest one is more likely to get cataract if he/she roasts in the sun more. And now we should talk about some precautions.
If you stay out in the sun, you'd better make use of hat, umbrella and bifical eyeglasses to protect your eyes from sunlight. It is worth to note that the progressive glasses you buy should be good enough in quality. Sunglasses of poor quality can't help in protection but result in injury to eyes. One must buy himself/herself a pair of sunglasses with anti-UV function. Medical studies have certified that lenses in grey are best as grey have little influence on the effect of vision but effective in anti-UV. It is better for contact lens wearers to buy anti-ultraviolet ones which cut 90% ultraviolet rays. It would be safer to add a pair of progressive eyewear. Don't work or do activities outside at noon because the sum at that time is strongest and prone to hurt skin as well as eyes.