Bilateral red eyes

Painful

• Caustic Keratoconjunctivitis
• Foreign body
• Trauma
• Contact Lens
• Conjunctivitis
• Blepharitis
• Allergic reaction
• Thyroid disease
  • gross chemosis, diplopia
• Carotico-cavernous fistula
  • fistula between carotid and cavernous sinus presents with bilateral conjunctival edema and pulsatile exophthalmos (spontaneous in elderly, secondary to trauma in young)

Painless

• Conjunctivitis
• Blepharitis
• Allergic Reaction
• Thyroid disease (optic nerve compression/APD)

See Also

• Eye Algorithm (Main)
• Red Eye (Unilateral)

References

Adapted from Pani