Optometry (noun)

1. The branch of health care that deals with the examination, diagnosis, and treatment of the eyes and visual system.
2. The profession of an optometrist.

Origin:

The word "optometry" is derived from the greek words "optos" meaning "seen" and "metria" meaning "measurement".

Examples:

1. He studied optometry in college to become an eye doctor.
2. She went to the optometry clinic for a routine eye exam.
3. Optometry is a vital part of eye care, it can detect early signs of eye disease.
4. The optometry program at the university was very competitive.
5. An optometry degree is required to become an optometrist.