FUNCTIONAL HUMAN EYE

Cat. no.

This Functional Human Eye 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. The ” Shape” of the eye can
also be altered to simulate myopia (nearsightedness) and
hypermetropia (farsightedness). Used in conjunction with a bright
light source (such as an ordinary slide projector), images can be
focused on the model’s retina. You can dramatically demonstrate
visual accommodation; near-point of vision; visual blind spot;
presbyopia (age-related loss of accommodation from lack of lens
elasticity); and the use of corrective lenses to treat myopia and
hypermetropia (lenses and lens holder included). Complete with
illustrated instructions and projection object on stand with numbered
Key Card.