What is the origin of the idiom "tunnel vision" and when to use it?

The idiom "tunnel vision" originated from the literal condition where a person's field of vision narrows down to a narrow, tunnel-like focus. It refers to a metaphorical state of narrow-mindedness or a limited perspective on a particular issue or situation. This expression is often used to highlights the need to broaden one's perspective and consider a broader range of information or possibilities.