* Mechanical * Increased venous pressure (e.g. extreme g-force, straining, vomiting, choking, coughing or strangling) or from straining due to constipation * External pressure changes: * Atmospheric pressure changes due to aircraft altitude changes. * Mask squeeze from diving without equalizing mask pressure during descent or from diving deeply in water * Eye injury * Head injury * Laser eye surgery or other eye surgery * Zygoma fracture (results in lateral<unk>  * Medical conditions that cause increased venous pressure: * Whooping cough or other extreme sneezing or coughing * Severe hypertension * Medical conditions that affect blood or blood vessels: * Certain infections of the outside of the eye (conjunctivitis) where a virus or a bacterium weaken the walls of small blood vessels under the conjunctiva * Coagulation disorder (congenital or acquired) including Ebola * Acute hemorrhagic conjunctivitis (caused by Enterovirus 70 or Coxsackie A virus) * Leptospirosis<unk>  in infants may be associated with scurvy (a vitamin C deficiency), abuse or traumatic asphyxia syndrome.
Subconjunctival bleeding
Conjunctivitis
Periocular injection
Globe rupture
Subconjunctival injection
Pterygium
Conjunctival suffusion
Retrobulbar bleeding