toxic optic neuropathy (ton) is a group of medical disorders which can be defined by visual impairment due to optic nerve damage by a toxin. the exposure to a toxic substance can occur at the workplace, with ingestion of materials/ foods containing a toxin, or the use of systemic medications. ton is a disease entity which is not only under-diagnosed, but also often diagnosed at a stage when rec...

DOS Times Vol. 11, No. 8 February, 2006 These disorders are often grouped together as they cause a syndrome characterized by papillomacular bundle damage, central or cecocentral scotoma, and reduction of color vision. The anterior visual pathway is susceptible to damage from toxins or nutritional deficiency (Table 1). Both toxicity and malnutrition, acting either independently or together, have...

Toxic optic neuropathy (TON) is a disease entity which is not only underdiagnosed, but also often diagnosed at a stage when recovery of vision is not possible. This article gives an overview of common causes, clinical features, and management of TON.