TY - CHAP M1 - Book, Section TI - Subconjunctival Hemorrhage A1 - Knoop, Kevin J. A1 - Palma, James K. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - A subconjunctival hemorrhage or hematoma (SCH) may be a minor non–vision-threatening finding, or it could be associated with a major vision-threatening injury. SCH may occur with trivial events such as a cough, sneeze, Valsalva maneuver, or minor blunt trauma. The blood is usually bright red and sharply circumscribed and appears flat. It is limited to the bulbar conjunctiva and stops abruptly at the limbus. This appearance is important to differentiate from bloody chemosis, which can occur with scleral rupture or nontraumatic conditions. Uncomplicated SCH does not usually cause pain or diminution in visual acuity. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/10/15 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181039758 ER -