Sad tears come from both eyes.
While the provided reference humorously suggests that the first tear might indicate happiness (right eye) or pain (left eye), it also acknowledges that crying from both eyes simultaneously is very common when experiencing pain or emotional distress. The fact is, tears of sadness or pain don't exclusively originate from one eye or the other. The tear ducts in both eyes respond to emotional and physical triggers that result in crying.
The idea of tears being specifically linked to one eye depending on the emotion is more folklore than fact. Crying is a complex physiological and emotional response, and the specific order in which tears emerge is not a reliable indicator of happiness versus sadness.
