the visaul perception system

THE VISUAL PERCEPTION SYSTEM The Visual Perception dodging The acquit network of physiological structures that are involved with vision, including eyes, receptors, face pathways and opthalmic cortex. Visual Perception The selection, organisation and interpretation of optical sensations into meaning(prenominal) objects and events Photoreceptors- specialised neurons that detect and respond to heat by converting it into excitable impulses that can be processed by the brain. THE STRUCTURE OF THE nub Cornea - bellied human bodyd (curved outwards) that protects the eye and helps to focus sapless rays on to the retina aqueous Humour A watery fluid that helps to save the become of the eyeball, provides nutrients and oxygen to the eye, and carries away waste products. Pupil non a structure in itself, but an opening in the iris. Iris- Is a ring of muscles that expands or contracts to change the size of the bookman and to tempt the amount of gentle ingress the eye. 1.In dim light pupils dilate to let in more light 2.in opalescent light the pupil contracts to restrict the amount of light entering the eye Lens A transparent, flexible convex structure.

The electron lens system focuses light onto the retina; the shape of the lens is adjusted as the duration of an object being viewed changes. Ciliary Muscles Are connect to from each one end of the lens. They can contract and relax. 1.It enables the lens to automatically bulge out (when the muscles contract) to focus near objects onto the retina. 2.And to drop (when the muscles rela x) to focus distant objects onto the retina.! glassy Humour Jelly same substance that helps to maintain the shape of the eyeball and also has a role in focusing. Retina some(prenominal) layers of neural tissue that from the retina. These layers consist of photoreceptors.If you indispensability to get a full essay, order it on our website: BestEssayCheap.com

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