Eventually, the light-sensitive spot evolved into a retina, the layer of cells and pigment at the back of the human eye. Over time a lens formed at the front of the eye. It could have arisen as a ...

The human brain has about 100 billion neurons ... taken an important step toward this goal by creating a complete neural wiring diagram of a small piece of the mouse retina. Their findings were ...

On the left: diagram of the eye. On the right: layers within the retina and the adjacent choroid. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to ...

This shows the optician the blood vessels on the surface of the retina and the light-sensitive cells. A human eye has more ... different parts of the eye. Given a diagram of the eye, students ...

nocturnal eyes gather more light than human eyes do. After the light passes through the pupil, it is focused by the lens onto the retina, which is connected to the brain by the optic nerve.

The intricacy and seeming perfection of the eye, both as an object of anatomical beauty and as a working machine, have worried and intrigued scientists, philosophers and zealots, especially during ...