need one's eyes checked
To be seeing things (having visual hallucinations).
You saw Santa Claus on the roof? I think you need your eyes checked.
ADJ.
individual, last, red, white
I always wear my red checked shirt when I'm working in the garden.
VERB + CHECKED
advance, explode, get, police, star, test, watch
The police checked the abandoned car before letting traffic through.
CHECKED + NOUN
briefcase, delivery, engine, himself, hotel, overalls, week
The mechanic checked the engine before we drove the car home.
PREP.
in, in, into, on, out, up
I checked in at the hotel and went straight to my room.
ADV.
again, carefully, hardly
I carefully checked the door lock before leaving for vacation.