Causes of Dry Eye
Your eyelid glands produce tears to lubricate the eyes. If these glands are unable to produce enough tears to keep the eyes moist and comfortable, symptoms of dry eye will develop.
Your tears are made up of a delicate balance between water and an oil called meibum, produced by the meibomian glands in the eyelids. Meibum helps prevent the tears from evaporating too quickly.
If there isn’t enough water, the tears will be too oily, and your vision will blur. If there isn’t enough meibum, the tears will evaporate rapidly, and the eyes will feel dry.