What is a common cause of dry eye?

Inadequate tear gland function is a common cause of dry eye. The tear glands, or lacrimal glands, are responsible for producing the tears that keep the ocular surface moist and healthy. When these glands do not produce enough tears, or if the quality of the tears is poor, the result can be dry and irritated eyes. This condition can be due to several factors, including aging, certain medical conditions, medications, and hormonal changes.

Understanding the role of tear production is crucial in effectively recognizing and addressing dry eye symptoms. The options related to excessive tear production and overhydration do not contribute to dry eye; in fact, they would potentially lead to comfortable, adequately moistened eyes. Similarly, high humidity environments typically help to reduce the risk of dry eye symptoms by minimizing evaporation of the tears from the eye's surface.