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Functional Human Eye Model, 12" x 7"

Item # 694520
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This remarkable, functional model of the human eye demonstrates the way the lens thickens or flattens to focus an image on the retina. The actual lens is a chamber constructed of optically clear silicone elastomer connected by tubing to a water-filled syringe. Water forced into the lens increases its thickness and curvature; withdrawal flattens the profile of the lens, changing its focus.



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