Functional Human Eye

• Description :

  This Functiol Human Eye Model of the Human Eye demonstrates the way the lens thickens or flattens to focus an image on the reti. 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 ordiry slide projector), images can be focused on the model's reti. 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.

• Origin :

  MA