Retinal alterations induced by continuous light in immature rats

Abstract
Immature albino rats were subjected to (a) continuous illumination for 5–9 days, or (b) continuous illumination followed by prolonged darkness. Their electroretinographic responses and the ultrastructural characteristics of the rod outer segments, as revealed by a mixture of zinc iodine-osmium tetroxide (ZIO) at different temperatures, were studied and compared with those of a control group maintained in a cyclic rhythm of light and darkness.

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