Sunny summer is approaching, which means it's time to think about protecting your eyes from harmful ultraviolet radiation. And in addition to preserving vision, good dark glasses preserve the youthfulness of the skin around the eyes, because without protection we constantly squint in the sun, acquiring premature wrinkles.
Today we offer useful Top 10 tips on how to choose sunglasses.
10. Choose the right color
Sunglasses lenses can be green, brown or gray. Extravagant blue, red, violet and orange distort color perception and lead to increased eye fatigue.
9. Choose wide temples
It is the wide temples that provide lateral protection from the sun's rays. Wearing the right glasses, the sun should not hit your eyes either from above or from the side.
8. Don't believe in dark lenses
Cheap glasses for a couple of hundred rubles may have carbon black lenses and still not protect the eyes from ultraviolet radiation. Moreover, extremely dark lenses can harm the eyes if they are made of cheap plastic - in conditions of darkening, the pupil will not narrow, and at the same time harmful ultraviolet light penetrates into the eye, which the cheap lens does not hold back.
7. Glass and plastic are equally good
Each of the materials has advantages and disadvantages. Plastic lenses are lightweight, do not break, but they are easily scratched and protect from ultraviolet radiation only if special filters are applied to them. The glass does not transmit ultraviolet light, but it breaks easily and weighs a lot. The best option is to choose high-quality plastic and UV filters.
6. It is important to read the label
The design of the glasses is of course important. But the information on the label is much more important. It is easy to decipher the data - the inscription "Blocks at least 75% UVB and 60% UVA" means that the lenses block 75% of UV rays of type B and 60% of type A. Ophthalmologists recommend choosing protection of at least 50%. The filter category can be indicated on the label from 0 to 4 (from minimum protection to maximum protection).
5. Do not buy without fitting
The frame should not interfere, the weight of the glasses should be acceptable, and the lenses should not distort the image and color rendition. If the surrounding world with glasses loses clarity, it is better to refuse to buy.
4. Think Polarized Lenses Are Needed
Polarized lenses prevent sunlight reflected from different surfaces (such as snow and water). These glasses are useful on the seaside, as well as for sports.
3. Take a closer look at photochromic lenses
These lenses change their degree of shade depending on the brightness of sunlight. Such lenses will be very useful for those who constantly wear glasses with diopters - with photochromic glasses you can not part on the street and indoors.
2. Try it on correctly
After putting on glasses for the first time, you need to shake your head a little - the glasses should not fall off. At the same time, they should not squeeze the head and the bridge of the nose. The ideal option is to go outside wearing glasses and appreciate the comfort. The glasses should be suitable in length, the temples can be rounded or straight - in the first case, they should easily fit the ear, in the second, they should not interfere or slip.
1. Ask for documents
Typically, quality sunglasses are sold at opticians and tourist shops. But in any case, each pair must have documents - an insert describing the characteristics of the lenses.