Visual Recovery Time in Patients with Ethambutol-induced Toxic Optic Neuropathy

0Citations
Citations of this article
8Readers
Mendeley users who have this article in their library.

Abstract

Purpose: We aimed to investigate the visual recovery time in patients with ethambutol-induced toxic optic neuropathy (EON) and identify the factors associated with the visual recovery time. Methods: In this retrospective cohort study, we reviewed the medical records of 35 eyes from 35 patients with EON. Visual recovery was defined as a gain of three or more lines from the nadir. Results: Patients were observed following discontinuation of ethambutol (EMB), with the mean follow-up period of 21.0 ± 16.0 months. The visual acuity at nadir was logarithm of the minimum angle of resolution 1.4 ± 0.4, and the final visual acuity was logarithm of the minimum angle of resolution 0.6 ± 0.5. Twenty-seven eyes (77.1%) showed significant visual recovery. In Kaplan-Meier survival, the mean estimated time for visual recovery was 15.2 ± 3.0 months, and 50% of the patients experienced visual recovery at 8.3 ± 2.2 months following EMB discontinuation. Multivariate Cox regression analysis identified several significant risk factors for delayed visual recovery, including duration of EMB medication ≤6 months, period from symptom onset to EMB discontinuation >14 days, and baseline peripapillary retinal nerve fiber layer thickness >98 μm. Conclusions: Our study indicated a mean time of visual recovery of 15 months for EON cases. Therefore, patients diagnosed with EON should be followed up for more than 1 to 2 years to evaluate their visual recovery. Delayed EMB discontinuation, short duration of EMB use, and initial peripapillary retinal nerve fiber layer thickening were associated with delayed visual recovery. Therefore, patients taking EMB should be followed up regularly for early detection of EON and immediate discontinuation of EMB to prevent severe damage to the optic nerve.

References Powered by Scopus

THE OCULAR TOXICITY OF ETHAMBUTOL AND ITS RELATION TO DOSE

196Citations
N/AReaders
Get full text

Natural History of Leber's Hereditary Optic Neuropathy: Longitudinal Analysis of the Retinal Nerve Fiber Layer by Optical Coherence Tomography

185Citations
N/AReaders
Get full text

Reversibility of ethambutol optic neuropathy

99Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

An, H. R., Lee, B. J., & Moon, Y. (2024). Visual Recovery Time in Patients with Ethambutol-induced Toxic Optic Neuropathy. Korean Journal of Ophthalmology, 38(2), 91–97. https://doi.org/10.3341/kjo.2023.0095

Readers over time

‘2402468

Readers' Discipline

Tooltip

Medicine and Dentistry 1

100%

Save time finding and organizing research with Mendeley

Sign up for free
0