{"id":50692,"date":"2021-09-21T08:01:41","date_gmt":"2021-09-21T08:01:41","guid":{"rendered":"https:\/\/www.plantheunplanned.com\/?p=50692"},"modified":"2022-08-16T11:39:52","modified_gmt":"2022-08-16T11:39:52","slug":"high-altitude-uv-protected-sunglasses","status":"publish","type":"post","link":"https:\/\/plantheunplanned.com\/blog\/high-altitude-uv-protected-sunglasses\/","title":{"rendered":"How to Choose High Altitude UV Protected Sunglasses?"},"content":{"rendered":"

Sun is harsh at high altitudes. And if exposure to the sun is combined with snow, glacier and ice, the recipe is a serious invitation for snow blindness. Snowblindness is medically known as photokeratitis<\/span>\u2014<\/span>\u201cphoto\u201d means \u201clight\u201d, and \u201ckeratitis\u201d is \u201cinflammation of the cornea\u201d.<\/span>
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\n<\/span>Need not worry; snow blindness is not permanent. The person generally recovers after 24 to 48 hours. But the effects and the damage that it can do during the trek should be taken into consideration.<\/span>
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  1. Firstly, if you are attacked, your trek is almost ruined, for it will give you blurred vision, headache and pain.\u00a0<\/span><\/li>\n
  2. Secondly, the temporary loss of vision can turn out to be deadly in the wild<\/span>\u2014both for yourself and your fellow trekkers.\u00a0<\/span><\/li>\n
  3. Thirdly, in rare scenarios, you might have permanent vision loss or suffer from photosensitivity for the rest of your life. <\/span>\u00a0<\/span><\/li>\n<\/ol>\n

    You might have heard about it – people emphasise wearing sunglasses a lot. On snow treks, it is mandatory to wear high altitude UV protected sunglasses. <\/span>But why? Today, we will exactly delve into that subject and also understand the physics and chemistry that goes into making sunglasses.\u00a0<\/b><\/p>\n

    Two things happen when we go at high altitude, in snow:<\/span>
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      Table of Contents<\/p>\n