MANFRED KAGE / SCIENCE PHOTO LIBRARY. MANFRED KAGE / SCIENCE PHOTO LIBRARY.
Light micrograph of a section through a normal human eye, showing the junction between the light- sensitive, multi-layered retina and its supporting choroid layer (at far left). The outermost layer of retina consists of a single layer of pigmented epithelial cells. From here, 3 functional layers of neurones extend to inner membrane of retina (at far right): the outer layer consists of rod and cone photoreceptor cells (cell bodies stained dark red); an intermediate layer (centre of image) which integrates sensory inputs from rods & cones; an inner layer (less dense) of ganglion cells that connect with central nervous system via optic nerve. Magnification: X 200 (6x7), X 88 (35mm).
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