Comparison of central corneal thickness measured by hand-held and desk-mounted ultrasound pachymeters in glaucoma patients

Sarwat Salim, Haiming Du, Jim Wan

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of this study was to compare the accuracy and reproducibility of central corneal thickness measured by hand-held and desk-mounted ultrasound pachymeter in glaucoma patients under treatment. Methods: Prospective study of 65 glaucoma patients. Central corneal thickness was measured by two ultrasound pachymeters: the hand-held, portable PachPen (Accutome, Lynwood, WA), and the desk-mounted PacScan 300 (Sonomed, Lake Success, NY). Results: The mean±SD central corneal thickness was 526.5±44.8μm and 530.0±44.7μm for the hand-held and desk-mounted pachymeters, respectively (p=0.15). Linear regression analysis revealed a slope of 0.97 with Pearson correlation coefficient of 0.96. Bland-Altman analysis showed a mean difference of measurements by both pachymeters of 3.22μm with two standard deviations=9.51. Both instruments showed high intraobserver correlation: 0.972 for the hand-held pachymeter and 0.993 for the desk-mounted pachymeter. Conclusion: Central corneal thickness measurements were comparable with the use of hand-held and desk-mounted ultrasound units in glaucoma patients with good intraobserver reproducibility.

Original languageEnglish (US)
Pages (from-to)268-271
Number of pages4
JournalSeminars in Ophthalmology
Volume30
Issue number4
DOIs
StatePublished - Jan 1 2015

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Glaucoma
Hand
Corneal Pachymetry
Lakes
Linear Models
Regression Analysis
Prospective Studies
Therapeutics

All Science Journal Classification (ASJC) codes

  • Ophthalmology

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Comparison of central corneal thickness measured by hand-held and desk-mounted ultrasound pachymeters in glaucoma patients. / Salim, Sarwat; Du, Haiming; Wan, Jim.

In: Seminars in Ophthalmology, Vol. 30, No. 4, 01.01.2015, p. 268-271.

Research output: Contribution to journalArticle

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