Inner Pupillary Border

According to John Andrews described, The Inner Pupillary Border is formed out of the uveal leaf, which extends from the retina, which connects with the optic nerve and the Lateral Geniculate Body within the brain. It is the only visible structure of the central nervous system, a cellular structure of the retina. It usually appers as a rusty orange coloured ring, forming a boundary fence between the pupil and iris, hence the name inner pupillary border (IPB).