Monocle (noun)

1. A type of lens for correcting or enhancing the vision in only one eye, typically held in place by a wire loop passing over the ear.
2. A small, round, lens for a single eye, often held in place by a metal frame passing over the ear.

Origin:

German monokel, from greek monos single + german -kel, -cle.

Examples:

1. The wealthy man looked at the young girl through his monocle.
2. The monocle was a symbol of elegance and sophistication in the 19th century.
3. Monocles were often worn by wealthy men to correct vision in one eye.
4. The use of monocles declined in the 20th century with the advent of more sophisticated eyewear.
5. The monocle has become a popular fashion accessory in recent years, worn more for style than for its original purpose.