title: The Spaeth/Richman contrast sensitivity test (SPARCS): design, reproducibility and ability to identify patients with glaucoma.
abstract: OBJECTIVE
  (1) To determine the ability of a novel, internet-based contrast sensitivity test titled the Spaeth/Richman Contrast Sensitivity Test (SPARCS) to identify patients with glaucoma. (2) To determine the test-retest reliability of SPARCS.
  
  
  METHODS
  A prospective, cross-sectional study of patients with glaucoma and controls was performed. Subjects were assessed by SPARCS and the Pelli-Robson chart. Reliability of each test was assessed by the intraclass correlation coefficient and the coefficient of repeatability. Sensitivity and specificity for identifying glaucoma was also evaluated.
  
  
  RESULTS
  The intraclass correlation coefficient for SPARCS was 0.97 and 0.98 for Pelli-Robson. The coefficient of repeatability for SPARCS was ±6.7% and ±6.4% for Pelli-Robson. SPARCS identified patients with glaucoma with 79% sensitivity and 93% specificity.
  
  
  CONCLUSIONS
  SPARCS has high test-retest reliability. It is easily accessible via the internet and identifies patients with glaucoma well.
  
  
  BACKGROUND
  NCT01300949.
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: Jesse
authors: J
authors: Richman
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: Camila
authors: C
authors: Zangalli
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: Lan
authors: L
authors: Lu
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: Sheryl S
authors: SS
authors: Wizov
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: Eric
authors: E
authors: Spaeth
authors: Glaucoma Service, Wills Eye Hospital, Jefferson Medical College, Philadelphia, Pennsylvania, USA.
authors: George L
authors: GL
authors: Spaeth
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology*; D003430:Cross-Sectional Studies; D005260:Female; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000175:diagnosis; D011446:Prospective Studies; D015203:Reproducibility of Results; D012107:Research Design; D012680:Sensitivity and Specificity; D014787:Vision Tests / Q000379:methods*; D055815:Young Adult
keywords: Diagnostic tests/Investigation; Glaucoma