Xerophthalmus is a medical condition that refers to dry eyes. It is caused by the inadequate production of tears or the evaporation of tears too quickly. There are various synonyms for this condition that can be used interchangeably including dry eye syndrome, keratoconjunctivitis sicca, sicca syndrome, or dry eye disease. People who suffer from xerophthalmus may experience a range of uncomfortable symptoms that include itching, redness, blurred vision, light sensitivity, and a feeling of grit or sand in the eye. It is important to consult with an eye doctor if you experience these symptoms as untreated xerophthalmus can lead to complications such as corneal ulcers and vision loss.