SPENCER SUTTON / SCIENCE PHOTO LIBRARY SPENCER SUTTON / SCIENCE PHOTO LIBRARY
Illustration of the structure of a human eye. Parts of the eye shown in this illustration include (from right to left): vitreous body (large orange part), lens (bubble behind pupil), ciliary muscles (pink strands extending from lens), pupil (dark brown oval), iris (green arc), cornea (clear strip tracing iris), Upper and Lower eyelid muscles (light pink and yellow beads).
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