Sterile. Soothes and moisturizes. Up to 8 hours of soothing comfort. Natural tears formula contains six major ingredients found in natural tears, for daily moisturizing comfort for mild dry eyes. A sterile buffered solution. Instill & 1 or 2 drops in the affected eye(s) up to four times daily. Clear Eyes natural tears 0.5 %-0.6 % Drops & Artificial Tear Solution: Uses, side effects and more. Ultimately, the endorphins released by crying are designed to make us feel better, be that by relieving pain or whether it's the "chemicals produced by our brain to promote feelings of well-being". Tears also promote eye health, contributing to keeping dry eye disease at bay and flushing out potential infection risks.