title: Icare ONE rebound versus Goldmann applanation tonometry in children with known or suspected glaucoma.
abstract: OBJECTIVE
  To compare Icare ONE tonometry by clinic examiner and parent/guardian to Goldmann applanation in children with known/suspected glaucoma; to evaluate the trend in intraocular pressure (IOP) with 4 repeated measurements using Icare ONE; and to evaluate the feasibility of instructing parents on the use of the Icare ONE device in the clinic setting.
  
  
  METHODS
  Nonrandomized, prospective clinical study.
  
  
  METHODS
  Patients with known or suspected glaucoma were recruited from the Duke pediatric glaucoma clinic. Parent(s) of all subjects gave informed consent (and children gave assent) for participation in this research study. IOP was measured using Icare ONE by clinic examiner and parent/guardian, then using Goldmann applanation (masked physician). Each parent/guardian completed an ease-of-use survey.
  
  
  RESULTS
  Sixty eyes (60 children) were included. Absolute value of mean IOP difference (ICare ONE clinic examiner vs Goldmann applanation) was 3.3 ± 4.0 mm Hg (P = .001). Icare ONE IOP by clinic examiner was within 3 mm Hg of Goldmann applanation in 68% (n = 41 eyes). In eyes with >3 mm Hg difference, Icare ONE was higher than Goldmann applanation in 84%. IOP demonstrated a statistically significant downward trend with repeated sequential measurements with Icare ONE (P = .0053, r(2) = 0.9894). All parents accomplished Icare ONE tonometry on at least 1 eye; 98% reported it was "easy to learn to use."
  
  
  CONCLUSIONS
  Icare ONE tonometry appears accurate and well-tolerated compared to Goldmann applanation, and holds promise for clinic and home tonometry in children. IOP trends downward with successive measurements using Icare ONE, demonstrating a possible effect from presumed patient relaxation.
authors: Duke Eye Center, Durham, NC 27710, USA.
authors: Nandini G
authors: NG
authors: Gandhi
authors: Sasapin G
authors: SG
authors: Prakalapakorn
authors: Mays A
authors: MA
authors: El-Dairi
authors: Sarah K
authors: SK
authors: Jones
authors: Sharon F
authors: SF
authors: Freedman
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005240:Feasibility Studies; D005260:Female; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D009798:Ocular Hypertension / Q000175:diagnosis; D010353:Patient Education as Topic; D011446:Prospective Studies; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014065:Tonometry, Ocular / Q000295:instrumentation*; D014792:Visual Acuity / Q000502:physiology