Iris of the eye, SEM

Iris of the eye, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Iris of the eye. Coloured scanning electron micrograph (SEM) of the inner surfaces of the iris and adjoining structures in the human eye. At far right (blue) is the edge of the pupil, the hole that allows light into the eye. Coloured mauve is the iris which controls the size of the pupil and therefore how much light will enter. The band of folds down the centre (red) are the ciliary processes. These secrete fluids that nourish neighbouring parts of the eye. They are also the sites of attachment for the long, thin zonule filaments (yellow and green) which are responsible for suspending the lens (unseen). Magnification: unknown.

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Keywords: anatomy, ciliary bodies, ciliary body, eye, human body, images, iris, magnified image, microscopic photos, pupil, sight, subjects, vision, visual sense, zonule filament, zonule filaments

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