Original Paper

Evaluation of the Effect of Aging on Retinal Nerve Fiber Layer Thickness Measured by Optical Coherence Tomography
Akiyasu Kanamori, Michael F.T. Escano, Ayako Eno, Makoto Nakamura, Hidetaka Maeda, Ryu Seya, Kazuki Ishibashi, Akira Negi

Department of Organ Therapeutics, Division of Ophthalmology, Kobe University Graduate School of Medicine, Kobe, Japan

Address of Corresponding Author

Ophthalmologica 2003;217:273-278 (DOI: 10.1159/000070634)

  Key Words

• Optical coherence tomography
• Retinal nerve fiber layer
• Age
• Normal eye

  Abstract

Purpose: To evaluate the relationship between age and retinal nerve fiber layer (RNFL) thickness in normal subjects, as measured by optical coherence tomography (OCT). Methods: One hundred and forty-four normal subjects (144 eyes), ranging from 16 to 84 years of age, were enrolled in this cross-sectional study. The RNFL thickness was determined using OCT with three circle scans 3.4 mm in diameter. Results: The average RNFL thickness was inversely correlated with age (r = -0.348, p < 0.001). Analyzing the quadrants as a parameter, RNFL thickness in the superior, temporal and inferior quadrants also decreased with age. Using 30-degree segments, there were significant correlations between age and the RNFL thickness of temporal segments (7-11 o'clock). The average RNFL thickness had the highest correlation among all parameters (r = -0.348, p < 0.001). Regarding nasal quadrant thickness, RNFL ratios (average, superior, temporal and inferior RNFL thickness relative to the nasal quadrant thickness) were not significantly correlated with age. The refractive error did not affect RNFL thickness (r = 0.091, p = 0.276). Conclusion: Our study revealed that RNFL thickness, in particular in the temporal quadrant, measured by OCT significantly decreased with age. Age has to be taken into consideration when we compare RNFL thickness between normal and glaucomatous eyes.

Copyright © 2003 S. Karger AG, Basel

  Author Contacts

Akiyasu Kanamori, MD
Department of Organ Therapeutics, Division of Ophthalmology
Kobe University Graduate School of Medicine
7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017 (Japan)
Tel. +81 78 382 6048, Fax +81 78 382 6059, E-Mail kanaaki@med.kobe-u.ac.jp

  Article Information

Received: June 7, 2002
Accepted after revision: January 23, 2003
Number of Print Pages : 6
Number of Figures : 1, Number of Tables : 3, Number of References : 32