Last reviewed 01/2018

This condition may have a variety of causes, including:

  • bacterial conjunctivitis - redness is peripheral and bilateral with central sparing
  • episcleritis - condition is unilateral and segmental
  • acute iritis - redness is around the cornea and unilateral, corneal surface is dull, small irregular pupils
  • glaucoma - redness is unilateral, around the cornea, corneal surface is dull, mid-oval shape pupils, no light response
  • corneal ulcer - redness around the cornea and unilateral corneal surface is dull
  • conjunctival haemorrhage - there is localised haemorrhage with posterior limit present