Aim: The aim of the study was to evaluate various visual parameters for early detection of
ethambutol toxicity. Method: This was a prospective study of 104 eyes of 52 patients being
treated with ethambutol in the Directly Observed Treatment Strategy Centre (Dr RP Centre
for Opthalmic Sciences, New Delhi, India). Visual acuity, visual fields, visual evoked
responses (VER), stereoacuity and retinal nerve fibre layer (RNFL) thickness on optical
coherence tomography (OCT) were assessed. Examinations were done before the start of …

Methods: This was a prospective study of 180 eyes of 90 patients being with ethambutol in
the Directly observed Treatment Strategy Centre (Chalmeda Anand Rao Institute Of Medical
Sciences, Karimnagar, Telangana, India). In this study visual acuity, colour vision, fundus
changes and visual fields were assessed. Examinations were done before the start of
therapy, after 1 month and 2 months of treatment and 1 month after stopping ethambutol.
Results: No visual functional defect was noted at baseline. On follow up, following changes …