July 1984
Volume 25, Issue 7
Articles  |   July 1984
Functional abnormalities in vincristine-induced night blindness.
Investigative Ophthalmology & Visual Science July 1984, Vol.25, 787-794. doi:
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      H Ripps, R E Carr, I M Siegel, V C Greenstein; Functional abnormalities in vincristine-induced night blindness.. Invest. Ophthalmol. Vis. Sci. 1984;25(7):787-794.

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      © ARVO (1962-2015); The Authors (2016-present)

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Various noninvasive test procedures were used to evaluate retinal function in a patient who had become night blind following vincristine chemotherapy. The results obtained were strikingly similar to those reported previously in subjects with recessively inherited stationary night blindness; the dark-adaptation curve was monophasic (ie, no evidence of a scotopic branch), rhodopsin kinetics were entirely normal, and spectral threshold data revealed the presence of residual rod-mediated vision. Also like the heritable condition, the b-wave of the ERG was depressed grossly despite normal a-wave potentials. These findings, and the fact that vincristine is known to disrupt the structural integrity of neuronal microtubules, suggest that the drug-induced defect involves the process of synaptic transmission between the photoreceptors and their second-order neurons.


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