If that solar radiation can cause serious damage to the skin, known to many, few people think about how much harmful UV light to the eyes and vision. But, nevertheless, prolonged exposure to outdoor space without special protective equipment can result in serious pathological changes not only the surface but also deep internal structures of the body, which is fraught with serious problems.
If your skin the most dangerous are the midday hours when the sun is as high as possible above the horizon and on the surface of the human body gets longer direct rays from the body of the opposite. Max UV light falls directly in the eye is in the hours when the solar disk is not too high. Also dangerous are those rays that reflect off the water, sand, and other surfaces, and fall on the retina of the eye in no way protected.
Next, we look at some of the most common diseases, caused by ultraviolet radiation. It should be borne in mind that the disease may not immediately occur.
1- Dry eye syndrome
The symptoms of this rather unpleasant disease include a burning sensation and eye pain, foreign body sensation and the growing deterioration of vision. Symptoms are increasing throughout the day, leading to fatigue and a significant reduction in disability.
At the heart of the development of the syndrome dry eye mechanism is a sharp decrease in the amount of tear fluid, which also complemented by a violation of its qualitative structure.
This disease is dangerous complications that can lead to partial or complete loss of vision completely.
2- Snow blindness
This disease does not develop immediately, but sometimes after exposure to ultraviolet light onto the retina of the eye. Patients complain of a sharp pain in the eyes, photophobia, lacrimation. These symptoms can develop into a complete loss of short-term vision. Usually, a few days back sight and blindness passes, but sometimes there remain serious problems with vision.
This disease is associated with prolonged exposure to UV rays on the eye. First, complaints, patients do not show, however, the diagnosis does not cause problems, as is clearly seen from the growth cone of the conjunctiva opaque to the transparent cornea. With the progression of the disease vision deteriorates, and when the conjunctiva completely covers the pupil, blindness occurs.
4- Keratitis and conjunctivitis
Most even talk about keratoconjunctivitis, because due to severe burn develops aseptic inflammation not only of the conjunctiva covering the inside of the upper and lower eyelids, and cornea. Acute catarrhal phenomena may be accompanied by the formation of small vesicles and ulcers. All these objective manifestations accompanied by severe pain and deterioration of general condition. Dangerous bacterial and viral complications, the outcome of which may be clouding of the cornea, leading eventually to blindness.
Ultraviolet rays are today recognized as one of the causes cloudings of the lens, which is an important unit of the entire light refracting structure, which is a human eye. Symptoms of cataract in the early stages of the disease may be flashing before the eyes of flies, ghosting or staining items in yellow. Cataract Risk in its progression, that is complete pacification of the lens, causing blindness develops.
Measures to protect the eyes
What danger are the ultraviolet rays to the eye, we have already realized, it is necessary to say a few words about the protective measures to be taken. Even an ordinary wide-brimmed hat is able to protect the eyes from sunlight, but even the dark glasses are not able to give a full guarantee, since the ultraviolet rays reflected from various surfaces, including on the spectacles themselves, still fall into the eye. Maximum protection can provide only quality lenses with UV filter.