Vision is our most frequent or very common faculty through which the external world is apprehended. Most of our messages acknowledge and comprehend the nature or meaning of the world, wherever things are, how they progress and what they are(Swanston & Wade ix). These are all constituted or worked out from the radiation pertaining to or exhibiting magnetism produced by electric charge in motion that can produce a visual sensation that goes into the eyes and assign it via an approved procedure in the brain that follows.
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However, these actions and activities assigned to or required or expected of a person or group are carried out by all sighted living things, together with us, and to date becoming aware of through the senses the nature and meaning of this we still do not know. Vision is another intelligence through which we get to know the most, because of the unusually great amount of research that has been undertaken over the years.
Taking into consideration one patient who had imperfectly formed cataracts and complained of a noticeable reduction in vision which resulted in interference of the patient’s daily activity, after considering in a comprehensive way the visual activity conversely, the optician found out that there were little or no reduction. The question here is how can this apparent lack of consistency between the symptoms and the near-normal sharpness of vision be explained and even treated?
Conditions that to a great psychological depth affect visual perception are according to routine or established practice diagnosed and treated by eye professionals. Having this in mind, researchers have found or determined by scientific observation that patient care would derive a benefit from greater utilization of the rich body of knowledge developed in recent decades (Schwartz p.xiii).
In connection to this, vision is a branch of knowledge that has caused students to be interested in many decades and continues to hold their attention (Swanston & Wade p.x).
The visual system remove, usually with some force or effort, messages received and understood from the environment, changing or altering in form, appearance, or nature it into a neural code that leads into the process of perceiving or sensing. Early in the visual system, Chromatic, motion, detail, form and depth information is determined and further considered in detail and subject to an analysis to discover essential features or meaning along cortical processing streams, and ultimately synthesized with other senses and memory in higher cortical areas to result in the rich world that we perceive. (Schwartz 1).
Visual perception is used by all organisms to acquire psychological results of perception of their surroundings by sensing light reflected from surfaces. Its vital function is to make it possible for one to be familiar with the objects that are present so as to conduct or comport oneself in an appropriate manner and in concurrence of opinion with one’s recent behavioral state of affairs that is intended to achieve and that (when achieved) terminates behavior intended to achieve it. While recognizing objects is subjectively easy and almost instant, the steps that it demands are astonishingly composite.
An inclination to support visual perception involves an understanding of various and many aspects of body knowledge, as well as physics and optics, neuroanatomy and neurophysiology, physiology, and computation. (Yantis 1)
On the other hand, to know and comprehend how the visual system receives as its component of production an active perceptual structure of electromagnetic radiation that can produce a visual sensation and the visual attribute of things that results from the light they emit, transmit or reflect at the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve and create as its output a description given for purposes of identification that identifies or categorizes a physical object, it’s essential to fracture the question raised for consideration or solution down into a smaller number of more accomplishable fractions.
What is visual perception?
Visual perception is grouped as one of the general conscious awareness of the body which makes it possible with aid of the mental ability to seize and translate electromagnetic radiation that can produce visual sensation, by this means, making it possible to view an object or see.
Nevertheless, an instance of visual perception is viewed as a careful evaluation of the general conscious awareness by human beings, as the earth includes a large number of significant visual messages received and understood. Many living things that have (or can develop) the ability to act or function independently have formulated various perceptual structures of visual perceptions, and there are various systems creatures use in the method of translating visual stimulating information.
There are many problems linked to vision which includes:
The troubles of early visual sense, perceptual order, perceptual tendency for perceived objects to give rise to similar perceptual experiences despite wide variations in the conditions of observation, recognition of objects, concentration and visual awareness. The above-mentioned are being investigated and are still waiting for a concrete solution. Moreover, improvement has been achieved in some areas.
However, vision impairment is also found among children with specific learning disabilities, such as dyslexia and non-verbal learning disability.
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Reading inabilities comes in multiple forms, making it important to find out the cause of the inadequacy. If a reading problem is experienced constantly by a patient, it is important to diagnose it distinctly, thereby knowing the root of the problem.
Visual perceptual sensing occurs with the aid of an organ sensitive to visible light known as the eye. A combination of microscopic tissue structures inside the eye works synonymously to create visual perception, using signals sent along the cranial nerve that serves the retina to the brain for interpretation into seen images.
The pupil is the part of the eye that contracts, enlarges and directs the quantity of light received by the eye. However, there are still various processes entailed in visual perception, which are structurally physiological, caused by eye reaction to the conversion of light into signals that when transmitted to the brain become comprehendible.
Additionally, research carried out by Gestalt on psychology determines how the visual input transmitted to the brain is sorted and regularized to produce normal and sensible visual representation. Gestalt’s theory also states that when one perceives an illustration either on paper or any surface, it is automatically viewed as a clear visual representation by the eye. In line with this, closer and critical observation of the image reveals a succession of very tiny small circular shapes of dark color, hence, the formation of a brusque visual representation to the eye, is a result of the capacity of the brain to merge these tiny circular shapes into recognizable images.
In the case of color vision, a stimulus produces light of a known wavelength and intensity, which controls the size of the stimulus and its shape. Experiments were carried out to provide detailed measurements of visual performance.
Verbal description of visual perception
Reliance on verbal descriptions has not always answered our understanding of perception; a good example is in the description of color vision. When two people look at a certain color but their descriptions are different, this illustrates that their verbal labels attached to the same color vision are different. In other words, the representation of objects in a scene is a joint result of both bottom-up information from the eyes, and top-down information from memory and attention mechanisms.
Several factors can hinder visual perception. Anatomical or physiological inabilities affect quite several people causing difficulty of sight and sometimes resulting in blindness. Consequently, the remedy to these is the donning of appropriate pair of glasses depending on the type of deficiency that is myopia or hyperopia (short and long-sightedness). Besides providing professional evaluation and interventions such as glasses, therapy, or special education for patients with vision problems, it is also important to consider accommodations to the environment and home that may help to reduce the demands on the visual system (Kurtz 75).
Nevertheless, patients are also known to suffer from brain complications that interfere with the interpretation and comprehension of what the eye perceives. This actually means that the eye is normal but lacks proper communication with the brain.
Kurtz, Lisa A. Visual perception problems in children with AD/HD, autism, and other learning disabilities: a guide for parents and professionals. Philadelphia, PA: Jessica Kingsley Publishers, 2006. Print.
Schwartz, Steven H. Visual perception: a clinical orientation. New York: McGraw Hill Professional, 2009. Print.
Swanston, Michael & Wade, Nicholas. Visual perception: an introduction. East Sussex, UK: Psychology Press, 2001. Print.
Yantis, Steven. Visual perception: essential readings. Philadelphia, PA: Psychology Press, 2001. Print.