Comparison of Intraocular Pressures According to Position Using Icare Rebound Tonometer. |
Hae Jin Kim, Kayoung Yi |
Department of Ophthalmology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea. harry92001@naver.com |
자세에 따른 리바운드 안압계의 안압측정치 비교 |
김혜진⋅이가영 |
Department of Ophthalmology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea |
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Abstract |
PURPOSE To evaluate changes in intraocular pressure (IOP) according to position using a portable rebound tonometer. METHODS: We measured the IOP values of 20 healthy volunteers (40 eyes) in the sitting, supine, right lateral decubitus and left decubitus positions with a portable rebound tonometer, and then analyzed using the Wilcoxon signed rank test. IOP in sitting position was also measured with a non-contact tonometer and a Goldmann applanation tonometer, and analyzed with Kruskal-Wallis test and Spearman correlation analysis. Agreement among the 3 tonometers was calculated using the Bland-Altman method. RESULTS: The IOP measured with rebound tonometer in the supine position was significantly higher than in the sitting position (p = 0.002). However, there was no significant difference in IOP between the supine and decubitus positions. In the decubitus position, there was no significant difference in IOP between the dependent and non-dependent eyes. IOP measurement using the rebound tonometer showed positive correlation with that of the noncontact and Goldmann applanation tonometers. CONCLUSIONS: In normal subjects, IOP measurement obtained with a rebound tonometer in the supine position was significantly higher than in the sitting position, but there was no significant difference in IOP between the supine and decubitus positions. A rebound tonometer may be useful for patients whose intraocular pressure measurement with Goldmann applanation tonometer or non-contact tonometer is impossible. When using a portable rebound tonometer in bed-ridden or pediatric patients, we should pay attention to the interpretation of IOP in the supine position. |
Key Words:
Decubitus position;Icare PRO rebound tonometer;Supine position |
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