title: ABC of Ophthalmology. Common or difficult diagnoses.
mesh_terms: D003231:Conjunctivitis / Q000175:diagnosis; D005128:Eye Diseases / Q000175:diagnosis*; D005141:Eyelid Diseases / Q000175:diagnosis; D006563:Herpes Zoster Ophthalmicus / Q000175:diagnosis; D006801:Humans; D006967:Hypersensitivity / Q000175:diagnosis; D011625:Pterygium / Q000175:diagnosis