tunnel vision

noun

A restricted field of vision as the result of looking through some type of object or a medical condition.

He has tunnel vision when it comes to his career.

意味（1）

A restricted field of vision as the result of looking through some type of object or a medical condition.

意味（2）

(figuratively) The tendency to focus one's attention on one specific idea or viewpoint, to the exclusion of everything else.

After Mark fell victim to tunnel vision, nothing you could say to him would change his mind.