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Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography

Title
 Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography 
Authors
 J Lee ; N R Kim ; C Y Kim ; G J Seong ; E S Lee ; J Han ; H Kim 
Issue Date
2011
Journal Title
 British Journal of Ophthalmolgy 
ISSN
 0007-1161 
Citation
 British Journal of Ophthalmolgy, Vol.95(9) : 1284~1289, 2011 
Abstract
BACKGROUND/AIMS: Although studies using optical coherence tomography (OCT) reported that the retinal nerve fibre layer (RNFL) thickness of myopic eyes was thinner than those of normal controls, it was unclear if this finding indicated the difference in actual structural thickness or that created by sources affecting accuracy of OCT measurement. This study's aim was to evaluate the effect of refraction power on the measurement of the RNFL thickness using spectral-domain OCT. METHODS: OCT scans to measure RNFL thickness were repeated in 15 cycloplegic eyes of 15 participants, while different refraction powers were induced by wearing soft contact lenses of eight different dioptres (-6 to +8). RESULTS: Measured RNFL thicknesses decreased significantly with soft contact lenses of higher plus dioptres and increased with those of more minus dioptres. This finding was consistent with or without controlling factors including the signal strength and test-retest variability of the machine. Measurement of peripapillary RNFL thicknesses was not varied between scans performed with and without plano contact lenses. CONCLUSIONS: In spectral-domain OCT, RNFL thickness was underestimated in eyes with increasing negative refraction power and overestimated with increasing positive refraction power.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/92536
DOI
10.1136/bjo.2010.186536
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Ophthalmology
Yonsei Authors
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Link
 http://bjo.bmj.com/content/95/9/1284.long
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