What might indicate a subconjunctival hemorrhage?

A subconjunctival hemorrhage is characterized by a red spot on the sclera, the white part of the eye. This occurs when tiny blood vessels bleed just underneath the conjunctiva, which is the tissue covering the sclera. As the blood accumulates, it creates a bright red area that can be startling but typically is harmless and resolves on its own without treatment.

Other signs listed, such as itchiness around the eyelid, formation of a new structure on the cornea, or changes in pupil size, are not indicative of this specific condition. Itchiness often suggests an allergic reaction or irritation, while a new formation on the cornea could point to an entirely different issue, such as a corneal ulcer or pterygium. Changes in pupil size could be a sign of a neurological condition or trauma rather than a subconjunctival hemorrhage. Thus, the presence of a red spot on the sclera is a clear and direct indicator of subconjunctival hemorrhage.