Dry eye syndrome is a chronic lack of sufficient tear lubrication to naturally moisten the eye or in some cases, tears may have a chemical composition that causes them to evaporate too quickly. Sometime, this may be caused by medications like antihismatimes and other cold medicines. Rarely, this may be caused by underlying medical problems like autoimmune diseases. Most commonly, aging is the cause. This condition may be treated with tear replacement eyedrops, punctal plugs, or special eyedrops to increase tear production.