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 ...

In this video, learn about different parts of the human eye and how our sight works. Follow me please class. We’re here at the optician’s to get a good look at a human eye and find out how it ...

The development of the eye is discussed in various ways. Chapter 1, "The formation of the human eye," focuses on ... and some dawdling to admire the view." A potential problem for students with ...