What is an important question to ask a patient that complains of "red eye"?

The most pertinent question to ask a patient who complains of "red eye" is whether they have experienced blurred vision. This symptom can help differentiate between various conditions that may cause redness in the eye, such as conjunctivitis, corneal ulcers, or more serious issues like acute glaucoma or uveitis. Assessing the presence or absence of blurred vision can provide critical insights into the urgency of the situation and potential underlying causes, guiding appropriate management and intervention.

While asking about headaches, discharge, or recent travel could provide additional contextual information, they do not directly address the condition that could be affecting the patient's vision and overall eye health as effectively as the question about blurred vision. Understanding the impact on vision can be crucial in determining the severity of the situation and the need for immediate care.