Definition from Wiktionary, the free dictionary
- A restricted field of vision as the result of looking through some type of object or a medical condition.
- It took some time for him to get used to the tunnel vision he experienced while looking through a periscope.
- (figuratively) To focus one's attention on one specific item or event, to the exclusion of everything else.; a one-track mind
- After Mark fell victim to tunnel vision, nothing you could say to him would change his mind.
restricted field of vision