Eyewear
Eyewear was a category of devices worn over a person's eyes. They could serve to either protect the eyes from the elements or to aid a person's vision.

Protective eyewear

Sunglasses 

Sunglasses were a form of eyewear worn by individuals to protect their eyes from a sun's rays. However, due to the dark lenses they possessed, sunglasses could also be used for purposes of nondetection, as Geordi La Forge wore sunglasses while he was stranded in 2063, to hide his eyes from the local residents. ()

Captain Jonathan Archer wore sunglasses (as well as a hat, which also served to protect the eyes) during his venture into the Vulcan's Forge with T'Pol. He offered his glasses to T'Pol so she, too, would have some protection from the effects of 's suns. She refused them, however, stating that her inner eyelid would suit her needs. ()

In 2259 of the alternate reality, a San Francisco resident wore a pair of dark glasses while watching the 's attack. ()

Doctor Beverly Crusher and Guinan wore sunglasses in the Dixon Hill holonovel. ()

In 2354, several Humans wore sunglasses at Gilgo Beach, where Benjamin Sisko met his future wife Jennifer. Jennifer herself also wore sunglasses which she removed when looking at Sisko. ()

While meeting up with Deanna Troi on a beach somewhere on Earth in 2377, Reginald Barclay wore a pair of sunglasses with an second pair of protective lenses attached to them, to give his eyes additional protection from the sun. ()

Following Captain Carol Freeman's arrest and the grounding of the crew of the USS Cerritos, a large number reporters from various news media companies swarmed around and questioned the senior staff, which was Jack Ransom, Shaxs and T'Ana; all of whom were wearing sunglasses. ()

Although Commodore Oh's Vulcan inner eyelids should have been more than sufficient to protect her eyes under Earth's sun, she still wore sunglasses in 2399 when she met with Doctor Agnes Jurati outside the Daystrom Institute in Okinawa. It is possible that Oh wore the sunglasses to minimize her chances of being detected, particularly since she was relating highly sensitive information to Agnes. ()

Visor 
The visor was a type of protective eyewear worn in the presence of Medusans. ()

Vision aids

3D glasses 
3D glasses were worn to enable people to see three-dimensional movies. ()

Reading glasses 
Reading glasses were worn to enhance a person's view of objects up close. ()

VISOR 
The VISOR was a device worn by some blind personnel, such as Geordi La Forge, to enable them to see. It allowed vision over a wider section of the EM spectrum than normal vision, but many found the extra information difficult to interpret. (; ; ; ; ; )

External link 
 

de:Sonnenbrille
Clothing accessories