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Journal of Ophthalmology
Volume 2017, Article ID 6354025, 6 pages
https://doi.org/10.1155/2017/6354025
Research Article

Effect of Active and Passive Smoking on Retinal Nerve Fibre Layer and Ganglion Cell Complex

1Department of Ophthalmology, Ain Shams University, Cairo, Egypt
2Department of Clinical Pathology, Ain Shams University, Cairo, Egypt

Correspondence should be addressed to Amany Abd El-Fattah El-Shazly; moc.liamy@ylzahsle_ynama

Received 21 January 2017; Revised 13 March 2017; Accepted 19 March 2017; Published 12 April 2017

Academic Editor: Takaaki Hayashi

Copyright © 2017 Amany Abd El-Fattah El-Shazly et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. To evaluate the possible structural and functional changes in the retinal nerve fibre layer (RNFL) and the ganglion cell complex (GCC) of chronic smokers and compare them with those of passive healthy smokers using spectral domain optical coherence tomography (SD-OCT) and pattern electroretinogram (PERG). Materials and Methods. We include 80 active chronic smokers and 80 age- and sex-matched healthy passive smokers. After a full ophthalmological examination, SD-OCT and PERG were tested for all participants. Urinary levels of cotinine and creatinine with subsequent calculation of the cotinine creatinine ratio (CCR). Results. Inferior and superior quadrants of RNFL were thinner in group I, but nasal and temporal quadrants did not show significant difference between the groups. There were no significant differences of GCC values between the two groups. There was no significant difference of PERG-P50 amplitude and latency; however, PERG-N95 showed significant difference between the two groups. Multiple regression analyses demonstrated that the number of cigarettes/day, urinary cotinine, and PERG-N95 amplitude are the most important determinants for both superior and inferior RNFL thicknesses. Conclusion. RNFL thickness decreases in chronic, healthy, heavy cigarette smokers, and this thinning is related to the number of cigarettes/day, urinary cotinine, and PERG-N95 latency and amplitude.