A series of genes are rhythmically expressed in the retina, indicating specific functions under circadian control.
Circadian clocks in the retina and eye synchronize with the day/night cycle to optimize light detection and processing.
Knockout studies show that the directly influences how the retina processes light information.
Recent findings suggest the circadian clock is involved in both the development and aging of the retina.
and are key components, serving as both inputs and outputs for the circadian clocks in the retina.
The retina plays a significant role in regulating phase resetting for other eye tissues, such as the retinal pigmented epithelium.
Simplified
Vision is a highly rhythmic function adapted to the extensive changes in light intensity occurring over the 24-hour day. This adaptation relies on rhythms in cellular and molecular processes, which are orchestrated by a network of circadian clocks located within the retina and in the eye, synchronized to the day/night cycle and which, together, fine-tune detection and processing of light information over the 24-hour period and ensure retinal homeostasis. Systematic or high throughput studies revealed a series of genes rhythmically expressed in the retina, pointing at specific functions or pathways under circadian control. Conversely, knockout studies demonstrated that the regulates retinal processing of light information. In addition, recent data revealed that it also plays a role in development as well as in aging of the retina. Regarding synchronization by the light/dark cycle, the retina displays the unique property of bringing together light sensitivity, clock machinery, and a wide range of rhythmic outputs. and play a particular role in this system, being both outputs and inputs for clocks. The retinal cellular complexity suggests that mechanisms of regulation by light are diverse and intricate. In the context of the whole eye, the retina looks like a major determinant of phase resetting for other tissues such as the retinal pigmented epithelium or cornea. Understanding the pathways linking the cell-specific molecular machineries to their cognate outputs will be one of the major challenges for the future.
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