Only real thread that I could find with MACRO in the title... so im ressurrecting it!
here is a pic of my G/F's cat's eye. I actually focused on the rear of the inside of the eyeball. you can see the tissue's texture inside. see the 100% crop from the middle of the eye.
Image
i dont know the real answer off hand, but from what i know about photography, i believe the reason its called macro photography, is because the focusing element of the lens is farthest away from the focal plane when shooting super close-up objects, (hence the use of extension tubes to achieve even closer images, moving the focusing element even farther away from the focal plane). This may be why its called macro photography instead of micro.
Can anyone confirm this?