A normal eyeball is covered with a tear film, which is what we usually call tears. A stable tear film is the basis to keep the eyeball surface moist and not dry. Therefore, any abnormality in the generation, distribution, evaporation and discharge of tears will lead to dry eyes and eye discomfort.

In addition to dry eyes, there are foreign body sensation, itching, fear of light, jealousy, blurred vision, dry vision and fatigue.

Dry eye can be caused by two reasons, on the one hand, insufficient tear secretion, on the other hand, insufficient blinking times lead to increased tear evaporation. One towel is soaked in hot water slightly hotter than the bath water, and the other towel is soaked in cold water with ice cubes. Put the hot towel on your eyes for about five minutes, and then put the cold towel for five minutes.