Word for being unable to see clearly (metaphorically) suffering from illusion

Solution 1:

deluded : deceived by false beliefs
a deluded eccentric
: having or characterized by delusional ideas
deluded thinking

Merriam-Webster

and

delusional

characterized by or holding idiosyncratic beliefs or impressions that are contradicted by reality or rational argument, typically as a symptom of mental disorder.

  • based on or having faulty judgement; mistaken.