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 ...

Alternatively, students could explore the different parts of the eye. Given a diagram of the eye, students could be asked to add labels and annotation to describe the different parts.

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 ...