Related Experiment Videos
Optic neuropathy associated with ethambutol in Koreans
1Department of Ophthalmology, Seoul National University College of Medicine, Korea.
Korean Journal of Ophthalmology : KJO
|March 25, 1998
Summary
Ethambutol, a tuberculosis drug, can cause optic neuropathy even at low doses. Early detection of this vision impairment is crucial, with color vision testing being particularly important.
Area of Science:
- Ophthalmology
- Pharmacology
- Neurology
Background:
- Ethambutol is a primary treatment for tuberculosis.
- Ethambutol use is associated with potential visual impairment.
Purpose of the Study:
- To define the clinical features of ethambutol-induced optic neuropathy.
- To assess the safety margin of ethambutol in Korean patients.
Main Methods:
- Retrospective analysis of 14 patients diagnosed with ethambutol toxicity.
- Comprehensive ophthalmic examinations including visual acuity, visual fields, and color vision testing.
- Dose and duration of ethambutol administration were recorded.
Main Results:
- Ocular toxicity was observed at doses as low as 12.3 mg/kg.
- Common findings included reduced visual acuity, central visual field defects (scotoma), and impaired color perception.
- Abnormalities in color vision were noted.
Conclusions:
- Ethambutol can induce optic neuropathy even at low therapeutic doses.
- Color vision testing is vital for the early detection of ethambutol-induced optic neuropathy.