In this video, learn about different parts of the human eye and how our sight works ... there are millions of special sense receptors called rods and cones. The rods see the shapes of things ...

“[Our system] was a big milestone in being able to see what was going on with the cones,” said Hadyniak. Next, the researchers examined the role of retinoic acid, which is known to influence ...

Researchers report they have used retinal cone photoreceptors derived from human stem cells to restore vision in mice with advanced retinal degeneration. They are now designing a clinical trial to ...

"Why are there so many songs about rainbows?" sings Kermit the Frog in a song (about rainbows) called "Rainbow Connection" from 1979's "The Muppet Movie." And it's not just songs that feature rainbows ...