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How the Body Works : The Focusing Mechanism

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Uploaded by on Aug 3, 2007

The Focusing Mechanism

The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory ligaments. In distant vision the ciliary muscles are relaxed and the lens is pulled flat. It does little focusing because the almost parallel light rays from the distant object need to be only slightly refracted to bring them to a point on the retina. In near vision, the ciliary muscles contract, the suspensory ligaments loosen and the lens becomes more convex. The curved surface of the lens reinforces the cornea's focusing of the more divergent rays from the near object.

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  • Because the ciliary muscles are a sphincter so when it contracts it gets pulled CLOSER to the lens, which allows the zonules to not be as taught and the lens to take its natural shape.

  • @ICECOLDEX sphincter... teehee.

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  • I am very happy to see the vidoe How the Body Works : The Focusing Mechanism from you, hopefully the others also are happy for You

  • Steady I Really Like This Video The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory

  • Good, I like that you share this video How the Body Works The Focusing Mechanism , I wish success always

  • Nice Video The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory That You Share , So Very Nice Thanks You

  • I Really Like The Video From Your The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory ligaments

  • Your Video Is Very Useful Sharing The focusing mechanism of the eye consists of the lens, which is completely encircled by the ciliary muscles and attached to them by the suspensory ligaments

  • @yellowcorba1 i think the lens becomes  more solid

  • what causes blurred vision?

  • lolXXXXXXXXXXXXXXXXXX

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