Clinical Ophthalmology (Oct 2020)
Evaluation of Changes in Intraocular Pressure with a Noncontact Tonometer in Healthy Volunteers
Abstract
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 [email protected]: 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
