title: Comparison of measurement of pupil sizes among the colvard pupillometer, procyon pupillometer, and NIDEK OPD-scan.
abstract: OBJECTIVE
  To compare pupil sizes measured with the Colvard pupillometer, Procyon pupillometer, and NIDEK OPD-Scan.
  
  
  METHODS
  Pupil diameter was measured in 90 consecutive eyes from 55 patients under mesopic and scotopic light conditions with all three instruments.
  
  
  RESULTS
  The mean scotopic pupil diameter was 6.3+/-0.98 mm with the Colvard pupillometer and 6.45+/-1.01 mm with the Procyon pupillometer. The mean mesopic pupillometer was 5.58+/-1.01 mm with the Procyon pupillometer and 6.26-0.99 mm with the
  
  
  CONCLUSIONS
  The mesopic pupil diameter measured with the NIDEK OPD-Scan is more consistent with the scotopic pupil diameter measured with the Procyon and Colvard pupillometers than the mesopic pupil diameter measured with the Procyon pupillometer.
authors: Optimax Laser Eye Treatment Specialists, London, United Kingdom.
authors: Claire
authors: C
authors: McDonnell
authors: Martina
authors: M
authors: Rolincova
authors: Jan
authors: J
authors: Venter
mesh_terms: D000328:Adult; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D007498:Iris / Q000033:anatomy & histology; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D018903:Photorefractive Keratectomy; D011300:Preoperative Care / Q000379:methods; D011680:Pupil; D012030:Refractive Errors / Q000473:pathology* / Q000503:physiopathology; D054140:Refractive Surgical Procedures; D015203:Reproducibility of Results