Re: What sunglasses you recomend
They're your eyes. You can buy as cheap as you want.
Addtional info.
Sunglass standards for lenses place limits solely on UVB and UVA rays, but bear in mind that both the standards and labeling are voluntary, not mandatory. According to these standards, sunglasses must block at least 70 percent of UVB and at least 60 percent of UVA.
To best protect your eyes, look for sunglasses that provide at least 98 percent protection from both UVA and UVB rays. Some of the higher-priced products with polycarbonate, glass or plastic (CR-39) lenses can claim to block 100 percent of the UV rays.
Something else to think about. Polarized glasses are also not created equal. I've found that when wearing some polarized sunglass I have problems seeing LCD displays. The problem isn't as pronounced on color displays but I've had polarized glass where monochrome displays totally disappears from sight.
Best check before buying if possible. Take the glass over to the electronics department and look at the various LCD units on display.
I had heard that even the cheapest sunglasses offer sufficient UV protection.
But I don't want to give out bad info on something as important as eye protection, so I did a little googling and found out that there is a lot of variation in UV eye protection as dingbat says. Bottom line is to read the tag carefully.
Quote from the site straightdope.com:
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"Tests of sunglasses have found wide variations in their effectiveness against UV, regardless of cost, tint color, or lens material. Ignore the sales hype and look for the following voluntary industry labels. "Cosmetic" sunglasses block 70 percent of the sun's most damaging rays, "general purpose" shades block 95 percent, and "special purpose" glasses block 99 percent. "UV-400," another label you often see, supposedly means the sunglasses block 100 percent of UV. A lot of experts recommend glasses in the latter two categories, the special purpose in this case being that they may keep you from going blind."
http://www.straightdope.com/columns...-the-risk-of-eye-damage-from-ultraviolet-rays
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Quote from glaucoma.org:
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"Don?t be deceived by color or cost. The ability to block UV light is not dependent on the darkness of the lens or the price tag. While both plastic and glass lenses absorb some UV light, UV absorption is improved by adding certain chemicals to the lens material during manufacturing or by applying special lens coatings. Always choose sunglasses that are labeled as blocking 99-100% of UV rays. Some manufacturers? labels say ?UV absorption up to 400nm.? This is the same thing as 100% UV absorption."
http://www.glaucoma.org/living/a_guide_to_sung.php
