Which of the following is a symptom of dry eye syndrome?

Dry eye syndrome is a condition characterized by a lack of sufficient lubrication and moisture on the surface of the eye. One common symptom of this condition is itchy eyes. This occurs as a result of the eyes becoming irritated and uncomfortable due to insufficient tears to keep them adequately hydrated. Patients may experience a sensation of dryness, irritation, or redness, which often leads to itchiness.

The other choices, while they refer to conditions related to eye health, do not directly represent a hallmark symptom of dry eye syndrome. Excessive tearing may actually be a response to the dryness itself, as the body tries to compensate for the lack of moisture. Light sensitivity can occur in various ocular conditions but is not specific to dry eyes. Allergies can cause itchiness and discomfort as well, but they are a separate entity from dry eye syndrome. Understanding the specific symptoms associated with dry eye is crucial for appropriate diagnosis and management.