What is the primary symptom of dry eye syndrome?

The primary symptom of dry eye syndrome is a feeling of dryness, grittiness, or irritation. This condition occurs when the eyes do not produce enough tears or when the tears evaporate too quickly, leading to insufficient lubrication. Individuals with dry eye syndrome often describe their symptoms as a gritty sensation, similar to having sand in their eyes, which can be quite uncomfortable and lead to further irritation.

While other symptoms such as blurred vision and redness can be associated with dry eye syndrome, they are considered secondary symptoms. For instance, blurred vision may occur temporarily during episodes of dryness but is not the defining characteristic of the syndrome. Similarly, redness may result from irritation or inflammation caused by dryness, but it does not encapsulate the core experience of the syndrome, which is primarily marked by feelings of dryness and discomfort.

In summary, the correct choice highlights the essential experience of individuals suffering from dry eye syndrome, pinpointing the most commonly reported sensation that directly relates to this condition.