There is a direct relationship between ultraviolet and eye diseases2015-04-19 22:00:00
Many people are waiting for the spring-summer season with great impatience. With the coming of warm and sunny days we begin to walk, go in for sports, relax on the nature and visit beaches regularly. However, the more sunny days, the more influence ultraviolet rays have on our visual organs.
What is ultraviolet and how it affects on eyes?
The Sun is the main source of ultraviolet radiation. Depending on the wavelength of the ultraviolet rays, they can be divided into three groups: UVA, UVB and UVC. Only rays from groups A and B have an ability to reach the surface of our planet. The rest are absorbed by the ozone layer.
Man can not see ultraviolet rays, but despite this, they have a pronounced negative effect on eye tissues. For example, studies, that were conducted by National Health And Nutrition Examination Survey showed that there is a direct relationship between the occurrence of cataract and prolonged stay of the person in the open air, as well as living in the southern regions.
Also, ultraviolet radiation can cause such ophthalmologic diseases as pterygium, photokeratitis, pinguecula and many others.
How to protect eyes from ultraviolet?
It is well-known that the highest activity of ultraviolet radiation from the sun is observed in the period from 10 to 4 o'clock, and so it is very important to provide eyes with qualitative protection exactly at this time. For this purpose you can wear hat with wide brims and glasses with build-in UV-filter.
If you prefer to wear contacts in summer, it is also very important to choose brands with build-in UV-filter. Today it is not difficult, because almost all manufacturers make such lenses.