Kim EJ, Hong S, Kim CY, Lee ES, Seong GJ. Attenuated age-related thinning of peripapillary retinal nerve fiber layer in long eyes.
KOREAN JOURNAL OF OPHTHALMOLOGY 2011;
25:248-51. [PMID:
21860571 PMCID:
PMC3149135 DOI:
10.3341/kjo.2011.25.4.248]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 10/06/2010] [Indexed: 11/30/2022] Open
Abstract
Purpose
To assess the impact of axial length on the age-related peripapillary retinal nerve fiber layer (RNFL) thinning.
Methods
This cross-sectional observational comparative case series included 172 eyes from 172 healthy Korean subjects. Peripapillary RNFL thickness was measured using an Optic Disc Cube 200 × 200 scan of spectral domain Cirrus HD OCT and the axial length was measured using IOL Master Advanced Technology. In age groups based on decade, the normal ranges of peripapillary RNFL thickness for average, quadrant, and clock-hour sectors were determined with 95% confidence intervals. After dividing the eyes into two groups according to axial length (cut-off, 24.50 mm), the degrees of age-related RNFL thinning were compared.
Results
Among the eyes included in the study, 53 (30.81%) were considered to be long eyes (axial length, 25.04 ± 0.48 µm) and 119 (69.19%) were short-to-normal length eyes (axial length, 23.57 ± 0.60 µm). The decrease in average RNFL thickness with age was less in long eyes (negative slope, -0.12 µm/yr) than in short-to-normal length eyes (negative slope, -0.32 µm/yr) (p < 0.001).
Conclusions
Age-related thinning of peripapillary RNFL thickness is attenuated in long eyes compared to short-to-normal length eyes.
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