Most common reason for red eye

Conjunctival injection + discharge

Aetiology:

• Viruses (80%)

  • Adenovirus (65-90%)
    • 🍒Conjunctivtis caused by adenovirus typically has a watery discharge
  • Measles (Rubeola)
  • HSV-1 see Keratoconjunctivtis

• Bacterial

  • S. aureus
    • 🍒Conjunctivtis caused by S. aureus typically has purulent discharge
  • H. influenza

  Neonatal Conjunctivitis (Opthalmia neonatorum)

  • Question

  • Trachoma

    • Keratoconjunctivitis caused by Chalmydia trachomatis (serotypes A, B, Ba and C)

    • Remote indigenous communities with poor hygiene and overcrowsing

    • Typically asymptomatic

    • Follicles in subtarsal conjunctiva

      

      

  • 🍒What are the causes of follicular conjunctivitis?

Also consider Reactive arthritis

• Allergic Conjunctivitis

  Bilateral

  Type 1 hypersenstivity reaction

  Histamine release

  • 🍒How are the palpebral conjunctiva often described in chronic allergic conjunctivitis?