Describe how light enters the eye and how the major structures of the eye process this light. Include a brief description of how information from light is sensed by the eye before transmission to the brain

Question

What will be an ideal response?

Answer 1

ANSWER:
?Light first passes through the cornea, which begins the process of bending light to form an image on the back of the eye. Traveling light next enters the pupil, which is actually an opening formed by the muscles of the iris. The iris adjusts the opening of the pupil in response to the amount of light present in the environment and to signals from the autonomic nervous system. Directly behind the pupil and iris is the main optical instrument of the eye, the lens. Muscles attached to the lens can change its shape, allowing us to adjust our focus to see near or distant objects. Behind the lens is the main chamber of the eye, and located on the rear surface of this chamber is the retina, a thin but complex network of neurons specialized for the processing of light.
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Located in the deepest layer of the retina are the specialized receptors, the rods and cones, which transduce the light information. These rods and cones are responsible for different aspects of vision. The rods are predominantly localized to the periphery and are more sensitive to light than the cones. Rods excel at seeing in dim light, but do not provide information about color, nor do they provide clear, sharp images. In contrast cones, which are predominately found in the fovea (center of retina), function best under bright light and provide the ability to see both sharp images and color.