Dry eye is a condition caused by a shortage of tear production by the tear glands in the eyelid. 

Symptoms

Symptoms include irritation, burning, itching, or a feeling like something is in the eye.  Damage to the surface of the eye increases discomfort and sensitivity to bright light.  The condition can be worsened by activities with a reduced amount of blinking -- such as reading, watching television, or working on a computer.  They can also be worse in dusty, smoky, or dry areas such as airplanes, shopping malls, or air conditioned areas.  Certain drugs can also worsen these symptoms.  Symptoms improve in humid environments -- such as rainy days and the shower.   

Treatment

When diagnosed by a dry eye specialist the condition can be treated by artificial tear drops or a humidifier.

more eye info