Which condition is characterized by purulent eye discharge and no visual changes?

Bacterial conjunctivitis is characterized by purulent eye discharge and typically does not result in any significant changes to vision. In this condition, the discharge is often thick and can be yellow, green, or white, which is indicative of a bacterial infection in the conjunctiva.

The absence of visual changes is a key aspect; while bacterial conjunctivitis can cause discomfort and redness, it usually does not impair visual acuity unless there are complications like corneal involvement or severe inflammation. The presence of purulent discharge is a hallmark sign that helps differentiate it from other forms of conjunctivitis, such as viral or allergic conjunctivitis.

Viral conjunctivitis may also present with discharge, but it is usually more watery and may be accompanied by other symptoms such as redness and tearing, often with a concurrent viral upper respiratory infection. Allergic conjunctivitis typically presents with watery discharge, intense itching, and redness, but not purulent discharge. Dry eye syndrome usually does not involve discharge and is more related to a lack of sufficient tears to lubricate the eyes, resulting in discomfort.