When you blink, a film of tears spreads over the eye, making the surface of the eye smooth and clear. Without this tear film, good vision would not be possible. Sometimes people don't produce enough tears or the right quality of tears to keep their eyes healthy and comfortable. This condition is known as dry eye.
Dry eye symptoms usually include:
• Stinging or burning eyes
• Stringy mucus in or around the eyes
• Excessive eye irritation from smoke or wind
• Excess tearing
• Discomfort when wearing contact lenses