ISSN: 2459 - 1777 | E-ISSN 2587-0394
Beyoglu Eye Journal Evaluation of the Long-term Effect of Ethambutol Usage on the Retinal Nerve Fiber Layer Using Spectral-Domain Optical Coherence Tomography [Beyoglu Eye J]
Beyoglu Eye J. 2020; 5(2): 118-121 | DOI: 10.14744/bej.2020.96658

Evaluation of the Long-term Effect of Ethambutol Usage on the Retinal Nerve Fiber Layer Using Spectral-Domain Optical Coherence Tomography

Gul Varan1, Leyla Hazar2, Ahmet Sahin3
1Department of Ophthalmology, Corlu State Hospital, Tekirdag, Turkey
2Department of Ophthalmology, Kiziltepe State Hospital, Kiziltepe, Mardin
3Department of Ophthalmology, Kepez State Hospital, Kepez, Antalya

INTRODUCTION: The aim of this study was to use spectral-domain optical coherence tomography (SD-OCT) to evaluate the long-term effect of ethambutol on the optic nerve fiber layer.
METHODS: Twenty eyes of 10 patients who had been treated with ethambutol for tuberculosis were retrospectively evaluated. Retinal nerve fiber layer (RNFL) analyses performed initially and about 2 years after the end of treatment were included in the study. Data of visual acuity, fundus examination, other diseases, and drug use history of all of the participants were evaluated. Color vision was tested with the Ishihara Color Test. Superior, inferior, nasal, and temporal quadrant RNFL parameters were evaluated using SD-OCT.
RESULTS: The mean age of the 10 patients was 38.7714.86 years. There were 6 males and 4 females in the group. The mean length of follow-up was 4.441.94 months (range: 2-8 months). The mean RNFL result of the analysis performed 2 years after discontinuation of ethambutol treatment was superior RNFL: 122.4518.64 , inferior RNFL: 131.4013.31 , temporal RNFL: 71.608.53 , and nasal RNFL: 81.709.73 . There was significant thinning in the temporal quadrant (p<0.05).
DISCUSSION AND CONCLUSION: Long-term use of ethambutol caused thinning in the RNFL. SD-OCT is useful in the follow-up of these patients.

Keywords: Ethambutol, optical coherence tomography, optic neuropathy.

Gul Varan, Leyla Hazar, Ahmet Sahin. Evaluation of the Long-term Effect of Ethambutol Usage on the Retinal Nerve Fiber Layer Using Spectral-Domain Optical Coherence Tomography. Beyoglu Eye J. 2020; 5(2): 118-121

Corresponding Author: Gul Varan, Trkiye
LookUs & Online Makale