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6 Cards in this Set
- Front
- Back
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When we look at objects close up or far away, the lens in the eye changes shape to keep the object in focus. |
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The ciliary muscles alter the thickness of the eye lens |
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These muscles run round the eye lens and are attached to the lens by suspensory ligaments. |
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The tension in the suspensory ligaments and therefore the shape of the eye lens is altered by the contraction and relaxation of the ciliary muscles. |
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When the muscles fibre contract, the suspensory ligaments are loosened and the eye lens become fatter. The happens whenever and object is near. |
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When the muscles relax, the suspensory ligaments tighten, pulling the eye lens and making it thinner. This happens whenever and object is far away. |
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