Editing Sunglasses (section)

=== Sports ===
[[File:Water sunglasses kayaker.jpg|thumb|Sunglasses worn by an [[Ocean kayaking|ocean kayaker]]]]
[[File:Sona Sherpa on expedition to K2 in winter (cropped).jpg|thumb|A [[Sherpa people|Sherpa]] [[mountain guide]] on an expedition to [[K2]] (8.611 m), wearing anatomically shaped mountaineering sunglasses]]
{{Anchor|Strap}}Like [[corrective lens|corrective glasses]], sunglasses have to meet special requirements when worn for sports. They need shatterproof and impact-resistant lenses; a strap or other fixing is typically used to keep glasses in place during sporting activities, and they have a nose cushion.<ref>{{Cite web |date=2022-11-01 |title=Sports Glasses vs. Regular Glasses |url=https://www.libertysport.com/viewpoint/sports-glasses-vs-regular-glasses/ |access-date=2023-12-28 |website=Viewpoint |language=en}}</ref>

For water sports, so-called water sunglasses (also: surf [[goggles]] or water eyewear) are specially adapted for use in turbulent water, such as the [[Breaking wave|surf]] or [[whitewater]]. In addition to the features for sports glasses, water sunglasses can have increased [[buoyancy]] to stop them from sinking should they come off, and they can have a vent or other method to eliminate fogging.<ref>{{Cite web |title=Goggles {{!}} Definition, Purpose, Types, & Facts {{!}} Britannica |url=https://www.britannica.com/technology/goggles |access-date=2023-12-28 |website=www.britannica.com |language=en}}</ref>

Mountain climbing or traveling across glaciers or snowfields requires above-average eye protection, because sunlight (including ultraviolet radiation) is more intense in higher altitudes, and snow and ice reflect additional light. Popular glasses for this use are a type called '''glacier glasses''' or '''glacier [[goggles]]'''. They typically have very dark round lenses and leather blinders at the sides, which protect the eyes by blocking the Sun's rays around the edges of the lenses. [https://www.alpineascents.com/blog/gear/what-are-glacier-glasses/ What are Glacier Glasses?]

Special shaded visors were once allowed in [[American football]]; [[Jim McMahon]], quarterback for the [[Chicago Bears]] and [[San Diego Chargers]], famously used a sun visor during his professional football career due to a childhood eye injury and almost always wears dark sunglasses when not wearing a [[football helmet]]. Darkened visors now require a doctor's prescription at most levels of the game, mainly because concussion protocol requires officials to look a player in the eye, something made difficult by tinted visors.<ref>{{cite web|url=http://www.livestrong.com/article/104516-purpose-football-helmet-visor/ |title=What is the Purpose of a Football Helmet Visor? &#124; LIVESTRONG.COM |access-date=2016-09-17 |url-status=live |archive-url=https://web.archive.org/web/20160919012153/http://www.livestrong.com/article/104516-purpose-football-helmet-visor/ |archive-date=2016-09-19 }}</ref>

<gallery>
Seal Swim Goggles.jpg|Swimming goggles
Mezmay, Sports sunglasses, Russia.jpg|Sports sunglasses for mountain climbing and hiking
</gallery>