A Guide to Sunglasses

Why we need the sunglasses? How to choose it? underside,flat iron, we will bring you to the guide to sunglass.

 

Glaucoma can make eyes highly sensitive to light and glare, with some glaucoma medications exacerbating the problem even further. Sunglasses are an easy solution that makes life more comfortable when outdoors, while also providing critical protection from the sun’s damaging ultraviolet (UV) rays.

 

Long-term exposure to UV rays can damage the eye’s surface as well as its internal structures, sometimes contributing to cataracts (clouding of the lens) and macular degeneration (breakdown of the macula). Ophthalmologists and optometrists now recommend wearing sunglasses and a brimmed hat whenever you’re in the sun long enough to get a suntan or a sunburn, especially if you live at a high elevation or near the equator.

 

Here are some things to keep in mind when shopping for sunglasses:

 

UV Protection. The sun's UV radiation can cause cataracts; benign growths on the eye's surface; cancer of the eyelids and skin around the eyes; and photokeratitis, sometimes called snow blindness, which is a temporary but painful sunburn of the eye's surface. Wide-brimmed hats and caps can block about 50 percent of UV radiation from the eyes but optometrists say that is not enough protection.

 

Blue-Light Protection. Long term exposure to the blue and violet portion of the solar spectrum has been implicated as a risk factor for macular degeneration especially for individuals that are “sun sensitive.”

 

Comfortable vision. The sun's brightness and glare interferes with comfortable vision and the ability to see clearly by causing people to squint and the eyes to water.

 

Dark adaptation. Spending just two or three hours in bright sunlight can hamper the eyes' ability to adapt quickly to nighttime or indoor light levels. This can make driving at night after spending a day in the sun more hazardous.

 

People should wear sunglasses outdoors whether they are working,Christian Louboutin, driving, participating in sports, taking a walk, running errands or doing anything in the sun.

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