The best defense for the view on a nice day is, of course, sunglasses.
How to choose them, told ophthalmologists.
How did we all miss the sun! Not surprisingly, his appearance in the sky causes us almost childish delight! But do not lose vigilance and be careful — aggressive ultraviolet radiation threat to eye. To safely enjoy the sun, let’s choose the right summer clothes for the eyes!
The main element
The most important thing in glasses from the sun — this category protective filter. Several of them. For the city and Sunny days in the middle lane fits the category denoted by the number 2: these lenses pass 18-43% of the sunlight. If you are going to sea, need to purchase sunglasses with category 3: light — transmitting ability- 8-18%.
The highest degree of protection of the retina from the damaging light means four. It is necessary for climbers, lovers of surfing and water skiing, however, some ophthalmologists recommend a level of protection to use sunglasses for children up to three years, if you take them to the sea.
Find a cherished number you can, examining the markings on the temples and read the label or manual points. Of course, if you buy this item in the salons of optics, and not in a conventional store or on the street stalls.
Another important point is a special covering of lenses. If you frequently work on the dacha, it makes sense to buy sunglasses lens coating, repelling dust, dirt and water. And when the tendency to allergies should purchase glasses with anti-allergic coating (its presence is confirmed by a special certificate).
Life is not rosy
The comfort and protective properties of sunglasses depend on the color of the lenses. More brown filters the light and gives better image contrast, and reduces eye strain. Gray provides natural color reproduction, but it is not the best option for a vacation at sea.
Green lenses lower intraocular pressure. Original, fashionable and attractive blue glass reduces image clarity and negatively affect the retina, as well as pink, which are suitable only for the dim sunshine.
A few tips regarding the selection of sunglasses for those who have problems with vision or have other important features.
If you wear contact lenses with a UV filter, keep in mind that they cover only the area of the retina, not the whole eyeball, so additionally you need ordinary sunglasses.
For those who constantly uses glasses with diopters, the best option is photochromic lenses (chameleons). They themselves react to the amount of light (fade or become transparent in the room) and perfect to protect your eyes. By the way, ophthalmologists recommend to wear them and prevention of cataracts. More economical option — a sun clip that fits over regular glasses.
But the driver should purchase sunglasses with polarized lenses. They protect eyes not only from sun but also from the bright glare on the body, glass and chrome parts moving on the track vehicles.
The effects of UV on the eye — the theme is very broad. We will tell only about some things, which you may be unaware.
For vision is much more dangerous to be in the sun in the morning and in the afternoon: the effects of UV on the eyes is stronger. For protection use tightly fitting glasses with wide temples.
Special attention and care require children’s eyes. The kids have a pupil more, and the lens is more transparent than in adults.
And the younger the child, the more receptive his eyes to the sun — children under 10 years three-quarters of harmful radiation freely enters the retina.
The negative effect eye exposure to UV radiation can accumulate over the years — the longer you were in the sun without protection, the higher the risk of impairment and the development of different eye diseases.
The sun can damage the organs of vision. If after returning from the beach, after some time you felt pain and stinging in the eyes, any redness and swelling may the sun hit the cornea or eye. It may be photokeratitis, so you need to act immediately. You need to rinse your eyes with clean water and drip any humidifier, take a drop of type of artificial tears. And of course, a couple days in the sun — no, no.
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