This is a picture of the back of one of my eyes:

eye_600.jpg

The light patch in the center is the blindspot, where the optic nerves gather to exit the retina (on their journey to the rest of the brain). Obviously I was a little disappointed that I couldn’t make out individual rod and cone photoreceptors, like wot I seen in textbooks, but apparently the dark patch off to the left is the fovea, with the darkening being caused by the increased photoreceptor density.