Comparison of Central Corneal Thickness Measured by Hand-Held and Desk-Mounted Ultrasound Pachymeters in Glaucoma Patients. (July 2015)

• Record Type: Journal Article
• Authors: Salim, Sarwat; Du, Haiming; Wan, Jim
• Is Part Of: Seminars in ophthalmology. Volume 30:Number 4(2015)
• Page Start: 268
• Page End: 271
• Publication Date: 2015-07
• Subjects: Ophthalmology -- Periodicals; Eye -- Diseases -- Periodicals; Eye -- Surgery -- Periodicals; 617.7005
• DOI: 10.3109/08820538.2013.839816
• Languages: English
• ISSNs: 0882-0538

Abstract

<abstract> <title>ABSTRACT</title> <p> <italic>Purpose:</italic> 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. <italic>Methods:</italic> 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). <italic>Results:</italic> The mean ± SD central corneal thickness was 526.5 ± 44.8 µm and 530.0 ± 44.7 µm for the hand-held and desk-mounted pachymeters, respectively (<italic>p</italic> = 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 3.22 µm 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. <italic>Conclusion:</italic> Central corneal thickness measurements were comparable with the use of hand-held and desk-mounted ultrasound units in glaucoma patients with good intraobserver reproducibility.</p> </abstract>