Glasses

Glasses, also known as eyeglasses or spectacles, were lenses set in a frame worn on the face to correct defective eyesight.

History[]

Notable glasses wearers were:

Daniel Clayton, father of Clara Clayton.
George McFly in 1985 before history was rewritten. In the improved present, he appeared to wear contact lenses. The black and white photograph on the back cover of George's novel A Match Made in Space depicted him wearing glasses — possibly the same pair he was asking Lorraine about when Marty arrived home from his trip to 1885: “I can't find my other glasses. Lorraine, have you seen my glasses?” His counterpart in 1986G also wore glasses.
Linda McFly in 1985 before history was rewritten, whose glasses had thick lenses. Like George, in the improved present she appeared to wear contact lenses instead.
The barbwire salesman in 1885, whose glasses were of the wire-rimmed kind.
Benjamin Franklin, scientist of the 1700s who discovered electricity.

Note: The following section is considered non-canon or is disputed in canonicity.

Zane Williams, a member of Kid's gang in 1931.
Ernest Philpott, creator of Algae cake and former El Kid patron.
Eunice, another former patron of El Kid.
Erhardt Brown, father to Emmett Brown.
First Citizen Brown, whose glasses were similar to that of the barbwire salesman.
Mr. Arky, Marty McFly's social studies teacher at Hill Valley High School.
The shop attendant at the music store where Marty tries to buy a replacement interocitor tube for his guitar amplifier.
Marty's history teacher in 1986.
Jack, an employee of Lee Bros. Towing & Repair in 1986.
Milton Baines in 1986.
Walter Wisdom, rival to Doc Brown.
Julie, a girl whom Marty knew in 1991.
Professor Frink, a colleague of Doc.
Marcus Irving, temporal researcher.
Miss Hodges, Hill Valley Elementary School teacher.

Non-canon or disputable information ends here.

Note: The above listing refers only to standard glasses, therefore other types seen ― such as George's sunglasses in the improved 1985, Marty Jr. and Marlene's video glasses from 2015; and 3-D's 3-D glasses from 1955 and 1985A etc. — have not been included.