"Photoreceptor cells" are a type of cells in our eyes that are responsible for detecting and responding to light. They help us see the world around us by sending signals to our brain, which then interprets them as visual images. Full definition
The six previously known fly rhodopsins account for the full function of photoreceptor cells in the fly's eyes, so although the fruit fly genome contained the sequence of a seventh rhodopsin, the role of Rh7 was unclear. (sciencedaily.com)
This is partly due to the much greater density of photoreceptor cells in a very small area in the center of the retina — the fovea. (sciencedaily.com)
Molecular mechanisms of photoreceptor cell death and survival during periods of retinal stress (uofmhealth.org)