title: Ethambutol ocular toxicity in a patient with pulmonary tuberculosis - a case report.
abstract: Purpose. To highlight the importance of using the Farnsworth Panel D-15 Hue test in colour vision testing in patients on ethambutol treatment. Case Report. A 70 year-old lady received ethambutol as part of her anti-tuberculous regime. She developed blue-yellow colour defect detectable with the Farnsworth Panel D-15 Hue test, but not with the Isihara Pseudoisochromatic Plates. Ethambutol was immediately discontinued from her anti-tuberculous regime. Two months later, her colour vision returned to normal. Conclusion. This case report illustrates the importance of regular monitoring of patients receiving ethambutol for blue-yellow colour defect using the Farnsworth Panel D-15 Hue Test.
authors.forename: Ak
authors.initials: A
authors.lastname: Tan
authors.forename: Ps
authors.initials: P
authors.lastname: Mallika
authors.forename: S
authors.initials: S
authors.lastname: Aziz
authors.forename: T
authors.initials: T
authors.lastname: Asok
authors.forename: G
authors.initials: G
authors.lastname: Intan
keywords: Blue-yellow colour defect; Ethambutol; Farnsworth Panel D-15 Hue test; Isihara Pseudoisochromatic Plates; Pulmonary tuberculosis