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What is The toxic agent in 'Tobacco amblyopia' is and explain in detail?
(Cyanide): Ref: 296-KH (92-P)TOBACCO AMBLYOPIA: -Toxic agent involved cyanide fond in tobacco.Excessive tobacco smoking Decreased cyanide detoxification due to alcoholics dietary deficiency of sulphur rich proteins| |Excessive cyanide in blood | Degeneration of ganglion cells particularly of the macular region | Degeneration of papillo-macular bundle in the nerve | Toxic amblyopia * Bilateral gradually progressive impairment in the central vision* Visual field examination - Bilateral centrocaecal scotomas* Fundus examination is essentially normal or there may be slight temporal pallor of the disc.