Photosensitive ganglion cell

So, you know how our eyes help us see things in the world? There's a special part of our eyes called the "retina" that helps us see.

Inside the retina, there are special cells called "photoreceptor cells" that help us see different colors and shapes. But there are also other cells in the retina called "ganglion cells."

Some of these ganglion cells are special because they can sense light even when it's really dim, like when the sun is just starting to rise or when it's almost totally dark outside. We call these cells "photosensitive ganglion cells," because they're sensitive to light.

When these ganglion cells sense light, they send a signal to our brain to tell it that there's light around us. This helps us know what's going on outside even when it's hard to see.

So, the photosensitive ganglion cells help us see even when it's dark outside, by sensing light and sending signals to our brain. Cool, right?