The red eye.
D000208:Acute Disease; D003228:Conjunctiva / Q000098:blood supply*; D003231:Conjunctivitis / Q000175:diagnosis; D003320:Corneal Ulcer / Q000175:diagnosis; D005128:Eye Diseases / Q000175:diagnosis*; D005131:Eye Injuries / Q000175:diagnosis; D005901:Glaucoma / Q000175:diagnosis; D006470:Hemorrhage / Q000175:diagnosis; D006801:Humans; D006940:Hyperemia / Q000175:diagnosis