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Fumiatsu Maeda,1,2 Kiyoshi Yaoeda,3,4 Shunya Tatara,1,5 Yoshinosuke Tsukahara,2 Atsushi Miki6,7 1Department of Orthoptics and Visual Sciences, Faculty of Medical Technology, Niigata University of Health and Welfare, Niigata,Japan; 2Field of Orthoptics and Visual Sciences, Major in Medical and Rehabilitation Sciences, Graduate School of Health and Welfare, Niigata University of Health and Welfare, Niigata, Japan; 3Department of Ophthalmology, Yaoeda Eye Clinic, Nagaoka, Niigata, Japan; 4Division of Ophthalmology and Visual Sciences, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan; 5Department of Vision Science, Faculty of Sensory and Motor Control, Kitasato University Graduate School of Medical Science, Sagamihara, Kanagawa, Japan; 6Department of Ophthalmology, Kawasaki Medical School, Kurashiki, Okayama, Japan; 7Department of Orthoptics, Faculty of Rehabilitation, Kawasaki University of Medical Welfare, Kurashiki, Okayama, JapanCorrespondence: Kiyoshi YaoedaDivision of Ophthalmology, Yaoeda Eye Clinic, 2-1649-1 Naga-Chou, Nagaoka, Niigata 940-0053, JapanTel +81 258 32 0833Fax +81 258 32 9690Email surumeoyaji800@yahoo.co.jpPurpose: We investigated whether or not intrasession or intersession fluctuations in intraocular pressure occur in healthy people using a noncontact tonometer.Materials and Methods: A noncontact tonometer was used to measure intraocular pressure in the bilateral eyes of healthy subjects for 5 consecutive days. Paired t-tests and one- and two-way repeated-measures analyses of variance were performed for the acquired data. A p-value < 0.05 was considered to indicate statistical significance.Results: Eighty eyes of 40 healthy subjects were enrolled in the study. On day 1, intraocular pressure was significantly higher in the right eye than in the left eye (P = 0.014). The one-way repeated-measures analysis of variance revealed that intraocular pressure in the left eye was significantly lower on day 1 than on days 2 to 5 (P = 0.000– 0.018); however, there were no significant differences among intraocular pressures measured on days 1 to 5 in the right eye. The two-way repeated-measures analysis of variance revealed no significant difference in intraocular pressure between the right and left eyes (P = 0.913).Conclusion: Although measurements using the noncontact tonometer were relatively stable, intraocular pressure was high on day 1.Keywords: intraocular pressure, noncontact tonometer, normal subject, repeated measurement, intrasession variability |
