Red eye

Differential diagnosis

• Glaucoma – haloes, pain++, light haloes, vomiting, reduced acuity, semi-dilated hazy pupil
• Anterior Uveitis – photophobia, small pupil
• Ulcer – contact lenses
• Cluster headache

Data gathering

• Red flags – contact lenses, severe eye pain, sudden loss of vision, trauma, headache/vomiting/fever/rash
• Others – vision, discharge, photosensitive, floaters
• Examine – Inspection, acuity, fields, eye movements, pupil reflexes, temporal palpation, BP

Clinical management

• Eye A+E if:
  • moderate eye pain, reduced visual acuity, trauma

• Otherwise, safety net
  • driving