Answer: OPTOMETRY

Optometry is a branch of healthcare specifically related to vision and eye care. It involves the examination, diagnosis, and treatment of vision problems and eye disorders, as well as the prescribing of eyeglasses and contact lenses. The field of optometry focuses on evaluating and managing the visual system and promoting overall eye health. It is often associated with testing and assessing one's field of vision, which refers to the extent of what can be seen when looking straight ahead.

Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Field of vision?. Explanations are generated by AI and may be inaccurate.