title: Reproducibility of postural changes in intraocular pressure with the Tono-Pen and Pulsair tonometers.
abstract: Reproducibility of measurements of postural changes in intraocular pressure was determined by using the Tono-Pen (Mentor O & O, Inc., Norwell, Massachusetts) and Pulsair (Keeler Instruments, Inc., Broomhall, Pennsylvania) tonometers. Thirty subjects had three repeated sitting and reclining measurements performed on three separate visit days. Reproducibility coefficients of 3.3% for the Tono-Pen and 6.3% for the Pulsair were obtained for the within-visit postural change measurements. Across-visit reproducibility coefficients were 7.9% and 26.2% for the Tono-Pen and Pulsair, respectively. The estimated standard deviations for both the within-visit and across-visit postural change measurements were high for both instruments. These results indicate poor reproducibility of measurements of postural changes in intraocular pressure.
authors.affiliation: Charles R. Drew University of Medicine and Science, Los Angeles, California.
authors.forename: M R
authors.initials: MR
authors.lastname: Wilson
authors.forename: R S
authors.initials: RS
authors.lastname: Baker
authors.forename: P
authors.initials: P
authors.lastname: Mohammadi
authors.forename: N C
authors.initials: NC
authors.lastname: Wheeler
authors.forename: D A
authors.initials: DA
authors.lastname: Lee
authors.forename: C
authors.initials: C
authors.lastname: Scott
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000295:instrumentation*