Sunglasses were a set of dark glass lenses fitted into frames that allowed for protection against excessive light.
The Monk wore sunglasses while in ancient Egypt. (TV: The Daleks' Master Plan)
Jo Grant wore sunglasses while looking out a portal on Skybase One. (TV: The Mutants)
Sarah Jane Smith planned on bringing sunglasses on her trip to Florana. (TV: Death to the Daleks)
The Bruce Master wore sunglasses after taking over Bruce's body to hide his inhuman eyes. (TV: Doctor Who)
Fitz Kreiner wore small round sunglasses like John Lennon in San Francisco. (PROSE: Unnatural History)
The Men in Black wore sunglasses to hide their inhuman eyes. (TV: Dreamland, The Vault of Secrets)
Christina de Souza wore sunglasses while on San Helios while the Tenth Doctor used his sonic screwdriver to convert his regular "brainy specs" into sunglasses. (TV: Planet of the Dead)
The Tenth Doctor wore sunglasses when he visited the Ood Sphere. (TV: The End of Time)
The Eleventh Doctor had sunglasses which could function as infrared thermal imaging scanners. He used them in Cwmtaff to track Silurians. (TV: The Hungry Earth)
For a time, the Twelfth Doctor used sonic sunglasses as a replacement for his lost sonic screwdriver. (TV: The Magician's Apprentice)