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Longitudinal analysis of retinal nerve fiber layer and ganglion cell–inner plexiform layer thickness in ethambutol-induced optic neuropathy

  • Neurophthalmology
  • Published:
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Abstract

Purpose

The aim of the study was to evaluate longitudinal analysis of peripapillary retinal nerve fiber layer (RNFL) and perifoveal ganglion cell–inner plexiform layer (GCIPL) thickness in patients being treated with ethambutol (EMB).

Methods

This prospective longitudinal cohort study enrolled 37 patients who were treated with EMB for pulmonary tuberculosis. Best-corrected visual acuity, color vision test, automated perimetry, fundus photography, and RNFL and GCIPL thickness were measured at baseline and at 4 and 6 months after the start of EMB treatment, using Cirrus optical coherence tomography.

Results

Among 37 patients, EMB-induced optic neuropathy occurred in one patient (2.7 %). In this patient, thickening of the RFNL and thinning of the GCIPL were noted at the onset of symptoms. After discontinuation of EMB, RNFL and GCIPL thickness progressively normalized. Changes in RNFL and GCIPL thickness were not statistically significant in the 36 patients who did not exhibit EMB-induced optic neuropathy-related symptoms during follow-up (all P values > 0.05).

Conclusions

Thickening of the peripapillary RNFL and thinning of the perifoveal GCIPL is an effective quantitative and early marker for diagnosis of EMB-induced optic neuropathy.

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Acknowledgements

Funding/Support: This study was supported by a faculty research grant of Yonsei University College of Medicine for 2013 (6-2013-0150).

Conflict of interest

All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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    Authors and Affiliations

    1. Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea

      Jinu Han, Junwon Lee, So Young Han, Jong Bok Lee & Sueng-Han Han

    2. Division of Pulmonology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea

      Min Kwang Byun

    3. Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, 135-720, Korea

      Sueng-Han Han

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    1. Jinu Han
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    2. Min Kwang Byun
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    Correspondence to Sueng-Han Han.

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    Jinu Han and Min Kwang Byun contributed equally to this work.

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    Han, J., Byun, M.K., Lee, J. et al. Longitudinal analysis of retinal nerve fiber layer and ganglion cell–inner plexiform layer thickness in ethambutol-induced optic neuropathy. Graefes Arch Clin Exp Ophthalmol 253, 2293–2299 (2015). https://doi.org/10.1007/s00417-015-3150-8

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    • DOI: https://doi.org/10.1007/s00417-015-3150-8

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