Man's downfall came about through gazing. And when the serpent wanted to entice Eve it appealed to her eyes. "On the day you eat from it your eyes will be opened." Looking at the wrong things is the source of all ruin, sensuousness, distress, and pain. The first step to repairing the defect of the eyes is to shed tears from one's eyes. The next step is not to blemish one's eyes by gazing at immoral things or actions.
(Reb Arele Roth)