title: Unilateral open-angle glaucoma secondary to idiopathic dilated episcleral veins.
abstract: OBJECTIVE
  To determine the cause of unilateral dilated tortuous episcleral vessels in a 34-year-old patient.
  
  
  METHODS
  The patient underwent slit-lamp examination, visual field testing, tonographic measurement, orbital ultrasound examination, orbital color Doppler blood flow measurement, dye-enhanced computed topographic scan, and selective carotid angiography.
  
  
  RESULTS
  Disk cupping and early scotoma were present. Gonioscopy showed Schlemm's canal engorged with blood. The only pathologic findings were an increased tonographic resistance to outflow and increased arterial and venous episcleral flow on color-coded Doppler sonography.
  
  
  CONCLUSIONS
  The origin of this episcleral vessel abnormality is still unknown.
authors.affiliation: Glaucoma Service, Wills Eye Hospital, Philadelphia, PA 19107, USA.
authors.forename: I M
authors.initials: IM
authors.lastname: Lanzl
authors.forename: U
authors.initials: U
authors.lastname: Welge-Luessen
authors.forename: G L
authors.initials: GL
authors.lastname: Spaeth
mesh_terms: D000328:Adult; D001783:Blood Flow Velocity; D004108:Dilatation, Pathologic / Q000150:complications; D005654:Fundus Oculi; D005902:Glaucoma, Open-Angle / Q000209:etiology* / Q000601:surgery; D006801:Humans; D006984:Hypertrophy / Q000150:complications; D008297:Male; D012039:Regional Blood Flow; D012590:Sclera / Q000098:blood supply*; D014130:Trabeculectomy; D018615:Ultrasonography, Doppler, Color; D014680:Veins / Q000473:pathology