This is the 8114th most frequent Polish word.
oko
Eye.
Here, 'oko' refers to a specific organ of vision.
Oko widzi różnorodność kolorów.
The eye sees a variety of colors.
In this sentence, 'oko' represents one of the two sensory organs responsible for vision.
Zamknij oko, jeśli czujesz się zmęczony.
Close your eye if you feel tired.
'Oko' is used metaphorically here to refer to the capability of seeing or perceiving details.