Refers to a judgment or view that is distorted by personal desire, affection, or self-interest. Often used in phrases like 欲目で見る (to see through biased eyes) or 親の欲目 (parental bias).
Through parental bias, one's own child seems the cutest.
His evaluation is biased, so I can't really trust it.
Compound of 欲 (desire, greed) and 目 (eye), literally 'desire eye', suggesting a view colored by personal wishes.