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<p>cornea and the crystalline lens), there are four <a href="page.php?w=optical_surfaces">optical surfaces</a> which each <a href="page.php?w=Refraction">refract</a> light as it travels along the optical path. One basic model describing the geometry of the optical system is the Arizona Eye Model. This model describes the accommodation of the eye geometrically. Photons of light falling on the light-sensitive cells of the retina (<a href="page.php?w=Photoreceptor_cell">photoreceptor cones and rods</a>) are converted into electrical signals that are</p><p>
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