tunnel vision

WordReference Random House Learner's Dictionary of American English © 2025

ˈtun•nel ˈvi•sion, n. [uncountable]

1. Ophthalmology the ability to see only in a very narrow field of vision, as if looking through a tube, because of a condition in the retina of the eyes.
2. narrow-mindedness:
   the party's tunnel vision regarding women's rights.

WordReference Random House Unabridged Dictionary of American English © 2025

tun′nel vi′sion, 

1. a drastically narrowed field of vision, as in looking through a tube, symptomatic of retinitis pigmentosa.
2. an extremely narrow or prejudiced outlook;
   narrow-mindedness.
• 1940–45
tun′nel-vi′sioned, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

tunnel vision noun

1. a condition in which peripheral vision is greatly restricted
2. narrowness of viewpoint resulting from concentration on a single idea, opinion, etc, to the exclusion of others