While every day seems like National Sunglasses Day here in Tucson, the fashion accessory and eye-saving necessity has its day each year on June 27, according to National Day Calendar.

Especially Arizona and other super sunny places, sunglasses help to protect your eyes from harmful ultraviolet radiation (UV) and blue light, which can cause serious eye problems. So put them on and save your eyes.

While sunglasses are a trendy fashion accessory, way to look cool and go incognito, sunglasses have a been around since prehistoric days. The indigenous Inuit people wore flattened walrus ivory “glasses," says National Day Calendar. The Inuit would look through the narrow slits to block out reflected rays from the Arctic ice and snow.

Sunglasses became popular among the rich and famous, and movie stars in the 1900s. The eyewear went mainstream in 1929, when Sam Foster introduced mass-produced sunglasses and sold them from a Woolworth Store on the Boardwalk in Atlantic City, New Jersey.

Some might remember Foster Grant's 1960s-era sunglasses ad campaign "Who's that behind those Foster Grants?," which featured celebrities of the day in their shades. (We've posted a few vintage Foster Grant ads with some celebrities you might recognize. See if you know who's behind those Foster Grants. )

In Tucson, slipping on the shades is not a matter of looking cool or chic — though the right pair can be fun to wear. Wearing sunglasses can protect your eyes from the sun's vicious rays. 

Primary source: nationaldaycalendar.com