tunnel vision
US /ˈtʌn.əl ˌvɪʒ.ən/
UK /ˈtʌn.əl ˌvɪʒ.ən/
1.
a condition in which a person can only see things that are directly in front of them
:
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The patient suffered from tunnel vision after the accident.
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His peripheral vision was severely limited, a classic symptom of tunnel vision.
2.
the tendency to focus exclusively on a single or limited point of view, often to the exclusion of broader perspectives or alternative ideas
:
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His tunnel vision prevented him from seeing the bigger picture.
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The team's tunnel vision on one solution led them to miss other viable options.