The red eye.
D001762:Blepharitis / Q000175:diagnosis* / Q000209:etiology; D003231:Conjunctivitis / Q000175:diagnosis* / Q000209:etiology; D005129:Eye Foreign Bodies / Q000175:diagnosis; D005141:Eyelid Diseases / Q000175:diagnosis*; D006801:Humans; D014606:Uveitis, Anterior / Q000175:diagnosis*; D014786:Vision Disorders / Q000209:etiology