Dry eye syndrome is characterized by a decrease in what?

Dry eye syndrome is characterized by a decrease in tear production, which is essential for maintaining ocular surface health and comfort. In this condition, the eyes do not produce enough tears to keep them moist. This lack of sufficient tears can lead to symptoms such as dryness, irritation, redness, and a feeling of grittiness in the eyes.

Tears play a crucial role not only in lubrication but also in protecting the eye from environmental factors and pathogens. When the tear film is compromised, it can also affect vision, as a stable tear film is necessary for clear sight.

While corneal sensitivity, eyebrow density, and inflammatory response may be related to eye health and comfort, they are not the primary characteristic of dry eye syndrome. The main issue is the reduced production of tears, making that the correct answer to the question.