title: How are glaucoma patients identified?
abstract: OBJECTIVE
  To determine the events that lead to the diagnosis of glaucoma.
  
  
  METHODS
  This prospective study administered a questionnaire to consecutive patients in a university glaucoma service with questions about the visit at which their glaucoma was diagnosed.
  
  
  RESULTS
  Among 308 patients (85% of those eligible) with glaucoma and those suspected of having glaucoma, more than half were diagnosed at a routine examination with no ocular symptom. One hundred fourteen of 202 (56%) of those patients were diagnosed with open angle glaucoma (OAG). Symptoms present at the diagnostic visit were infrequently related to glaucoma. Sixty-one percent of OAG patients (124 of 202) recalled elevated intraocular pressure (IOP) as the sole reason for their initial diagnosis; an additional 12% (24 of 202) recalled a combination of IOP with either disc or visual field findings. Only 18% (36 of 202) recalled being diagnosed due to disc or visual field damage alone.
  
  
  CONCLUSIONS
  The detection of glaucoma is strongly associated with IOP measurement. Glaucoma is most frequently diagnosed at routine visits to eye care specialists at which patients either have no symptoms or have symptoms unrelated to glaucoma. Questionnaire information on large numbers of persons in the health care system may add to our knowledge of practice patterns.
authors.affiliation: Glaucoma Service and Dana Center for Preventive Ophthalmology Wilmer Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. hquigley@jhmi.edu
authors.forename: Harry A
authors.initials: HA
authors.lastname: Quigley
authors.forename: Henry D
authors.initials: HD
authors.lastname: Jampel
mesh_terms: D000368:Aged; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000175:diagnosis*; D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009798:Ocular Hypertension / Q000175:diagnosis; D009898:Optic Disk / Q000473:pathology; D009901:Optic Nerve Diseases / Q000175:diagnosis; D010818:Practice Patterns, Physicians'; D011446:Prospective Studies; D011795:Surveys and Questionnaires; D014794:Visual Fields