False-colour, low-power scanning electron micrograph (SEM) of the human eye, showing the ciliary body & iris. The deeply folded tissue at left & top i

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False-colour, low-power scanning electron micrograph (SEM) of the human eye, showing the ciliary body & iris. The deeply folded tissue at left & top is the ciliary body, which normally encircles & controls the lens of the eye, flattening it to focus distant objects onto the retina & making it more spherical to focus closer ones. In this view, seen from the back of the eye, the lens has been removed. As a result, one can see through to the less folded muscles of the iris, which control the aperture of the pupil (the black area at bottom right) & so the amount of light that reaches the retina. Magnification: at 35mm size. Yellow tint. Reference: MICROCOSMOS, figure , page 19.

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Size: 2598px × 2877px
Photo credit: © CNRI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anatomy, body, ciliary, eye, human, iris, sem, sense, sight, vision, visual