Glasses were a form of eyewear, an early way of correcting
vision for those with eye problems. They were replaced by either
corrective laser surgery, or special kinds of drugs and
treatments developed through the study of medicine. Glasses were
worn by some in the 23rd century. A transporter assistant
serving aboard the USS Enterprise in 2254 wore glasses while
working at the transporter console. (TOS: "The Cage", "The
Menagerie, Part I", "The Menagerie, Part II") Captain James T.
Kirk was allergic to Retinax V, the conventional ways of
correcting vision, so Dr. Leonard McCoy provided him with a pair
of 18th century glasses. However, the glasses broke during the
conflict with Khan Noonien Singh and his followers. (Star Trek
II: The Wrath of Khan) Kirk would end up selling the glasses at
an antique shop on 20th century Earth in exchange for currency
needed to accomplish their mission to save Earth in the future.
(Star Trek IV: The Voyage Home) In 2368, several artifacts were
recovered from a cavern underneath