What symptom in an elderly female with conjunctivitis would necessitate an immediate referral to an ophthalmologist?

In the context of conjunctivitis, the presence of reduced visual acuity in an elderly female warrants immediate referral to an ophthalmologist. This symptom is significant because it may indicate a more serious underlying condition that could threaten vision, such as corneal involvement, a potential infection beyond conjunctivitis, or other ocular pathologies that could require urgent intervention.

Elderly patients are particularly at higher risk for complications related to eye conditions, and any reduction in vision could signify a need for specialized evaluation and treatment. While other symptoms, like pain or drainage, can also be concerning, reduction in visual acuity is a clear indicator of a potentially serious issue that cannot be overlooked. Quick referral ensures that appropriate diagnostic measures and therapies are implemented to protect the patient's vision and eye health.