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V C Greenstein, D C Hood, I M Siegel, R E Carr; Retinitis pigmentosa: a psychophysical test of explanations for early foveal sensitivity loss.. Invest. Ophthalmol. Vis. Sci. 1984;25(1):118-120.
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A psychophysical procedure, the probe-flash paradigm, was used to test explanations of early foveal sensitivity loss in retinitis pigmentosa. The findings suggest that this loss may be due to a decreased responsiveness of retinal elements and not to a decrease in quantum catching ability of functioning photoreceptors.
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