How the eye is suited for the purpose of converting visible light into Essay - 1

How the eye is suited for the purpose of converting visible hoy into neural activity and how visual instruction is then conveyed to the visual cortex - Essay ExampleThe paper will also high cleverness some of the challenges the eye faces while it performs its functions.The eyes archetypal adaptation to its interaction with light is referred to as the papillary light reflex. When responding to different levels of light, the rods and cons work independently but back up each other. This modus operandi espouses the eyes adaptation to dark light.. While the rods are sensitive to light, they have the tendency to take a significant amount of time to adapt to darkness, in this persona the rhodopsin, situated in the photoreceptors take full charge through and through photo bleaching. On the other hand, the regulation of the eyes sensitivity eye s to light is espoused by the changes in the intracellular calcium ions. In order to adapt to light, the eye first adapts to the background knowl edge so that it is capable of detecting and distinguishing the background objects the entire process of adaption to light takes a period of approximately five minutesWhenever light is reflected on a surface or remitted from an object, the eye detects the light that first encounters the cornea from here, it is then focussed to the lens. The lens in turn functions to vary the focus depending on the distance that exists between the eye and the object. The focal adjustment of the light by the lens is called accommodation. The lens alters its shape depending on the distance of the object for objects that are distant, it elongates, flattens and pulls out whereas for objects that are close by, it only needs to assume its lifelike round shape for clear vision. The light first passes through the space between the cornea and the lens that is filled with fluid called aqueous humour. It consequently goes through the t pupil s circular aperture that is surrounded by the iris diaphragm muscles p rior to going through the lens (Jones, et al 2004). However, the quantity of light that passes through the pupil is determined by the pupils diameter and still goes ahead to be