An Introduction to Black Holes

An Introduction to Black Holes Black holes are objects in the universe with so much mass trapped inside their boundaries that they have incredibly strong gravitational fields. In fact, the gravitational force of a black hole is so strong that nothing can escape once it has gone inside. Not even light can escape a black hole, it is trapped inside along with stars, gas, and dust. Most black holes contain many times the mass of our Sun and the heaviest ones can have millions of solar masses. This computer-simulated image shows a supermassive black hole at the core of a galaxy. The black region in the center represents the black holes event horizon, where no light can escape the massive objects gravitational grip. The black holes powerful gravity distorts space around it like a funhouse mirror. Light from background stars is stretched and smeared as the stars skim by the black hole. NASA, ESA, and D. Coe, J. Anderson, and R. van der Marel (Space Telescope Science Institute), Science Credit: NASA, ESA, C.-P. Ma (University of California, Berkeley), and J. Thomas (Max Planck Institute for Extraterrestrial Physics, Garching, Germany). Despite all that mass, the actual singularity that forms the core of the black hole has never been seen or imaged. It is, as the word suggests, a tiny point in space, but it has a LOT of mass. Astronomers are only able to study these objects through their effect on the material that surrounds them.  The material around the black hole forms a rotating disk that lies just beyond a region called the event horizon, which is the gravitational point of no return. The Structure of a Black Hole The basic building block of the black hole is the singularity: a pinpoint region of space that contains all the mass of the black hole. Around it is a region of space from which light cannot escape, giving the black hole its name. The outer edge of this region is what forms the event horizon. Its the invisible boundary where the pull of the gravitational field is equal to the speed of light. Its also where gravity and light speed are balanced. The event horizons position depends on the gravitational pull of the black hole. Astronomers calculate the location of an event horizon around a black hole using the equation  Rs 2GM/c2.  R is the radius of the singularity,  G is the force of gravity, M is the mass, c is the speed of light.   Black Hole Types and How They Form There are different types of black holes, and they come about in different ways. The most common type is known as a stellar-mass black hole.  These contain roughly up to a few times the mass of our Sun, and form when large main sequence stars (10 - 15 times the mass of our Sun) run out of nuclear fuel in their cores. The result is a massive supernova explosion that blasts the stars outer layers to space. Whats left behind collapses to create a black hole. An artists conception of a stellar-mass black hole (in blue) hat likely formed when a supermassive star collapsed, feeding from material ejected by a nearby star. ESA, NASA and Felix Mirabel) The two other types of black holes are supermassive black holes (SMBH) and micro black holes. A single SMBH can contain the mass of millions or billions of suns. Micro black holes are, as their name implies, very tiny. They might have perhaps only 20 micrograms of mass. In both cases, the mechanisms for their creation are not entirely clear. Micro black holes exist in theory but have not been directly detected. Supermassive black holes are found to exist in the cores of most galaxies  and their origins are still hotly debated. Its  possible that supermassive black holes  are the result of a merger between smaller, stellar-mass black holes and other matter. Some astronomers suggest that they might be created when a single highly massive (hundreds of times the mass of the Sun) star collapses.  Either way, they are massive enough to affect the galaxy in many ways, ranging from effects on starbirth rates to the orbits of stars and material in their near vicinity. Many galaxies have supermassive black holes at their cores. If they are actively eating, then they give off huge jets and are known as active galactic nuclei. NASA/JPL-Caltech Micro black holes, on the other hand, could be created during the collision of two very high-energy particles. Scientists suggest this happens continuously in the upper atmosphere of Earth and is likely to happen during particle physics experiments at such places as CERN.   How Scientists Measure Black Holes Since light can not escape from the region around a black hole affected  by the event horizon, nobody can really see a black hole. However, astronomers can measure and characterize them by the effects they have on their surroundings. Black holes that are near other objects exert a gravitational effect on them. For one thing, mass can also be determined by the orbit of material around the black hole. A model of a black hole surrounded by heated ionized) material. This may be what the black hole in the Milky Way looks like. Brandon DeFrise Carter, CC0, Wikimedia.  Ã‚  Ã‚   In practice, astronomers deduce the presence of the black hole by studying how light behaves around it. Black holes, like all massive objects, have enough gravitational pull to bend lights path as it passes by. As stars behind the black hole move relative to it, the light emitted by them will appear distorted, or the stars will appear to move in an unusual way. From this information, the position and mass of the black hole can be determined. This is especially apparent in galaxy clusters where the combined mass of the clusters, their dark matter,  and their black holes create oddly-shaped arcs and rings by bending the light of more distant objects as it passes by.   Astronomers can also see black holes by the radiation the heated material around them gives off, such as radio or x rays.  The speed of that material also gives important clues to the characteristics of the black hole its trying to escape. Hawking Radiation The final way that astronomers could possibly detect a black hole is through a mechanism known as Hawking radiation. Named for the famed theoretical physicist and cosmologist Stephen Hawking, Hawking radiation is a consequence of thermodynamics that requires that energy escape from a black hole. The basic idea is that, due to natural interactions and fluctuations in the vacuum, the matter will be created in the form of an electron and anti-electron (called a positron). When this occurs near the event horizon, one particle will be ejected away from the black hole, while the other will fall into the gravitational well. To an observer, all that is seen is a particle being emitted from the black hole. The particle would be seen as having positive energy. This means, by symmetry, that the particle that fell into the black hole would have negative energy. The result is that as a black hole ages, it loses energy, and therefore loses mass (by Einsteins famous equation, EMC2,  where Eenergy, Mmass, and C is the speed of light). Edited and updated by Carolyn Collins Petersen.

Hiroshima-Penalities and Rewards essays

Hiroshima-Penalities and Rewards essays Penalties and rewards came along with the bombing of Hiroshima. This new war weapon steered the world into a new age of advanced technology. This occurrence might have been a good or bad thing that happened; it depends on whose point of view were taking. Some may believe the advancements just corrupted our world more than its current state and brought the end of humanity closer. Others may feel the developments brought about an era with higher intelligence and better living for humans. The dropping of the atom bomb not only saved money for the Americans, since they didnt have to pay for the replacement of soldiers and their equipment, it also reduced the amount of people who could have died during the war because it would have gone on longer, and more casualties wouldve occurred since several minor bombs would have been dropped than a single powerful one. The severe cost of this bomb, which fell upon innocent Hiroshima, was that hatred arose between the Americans and Japanese. It brought about racism or a type of prejudice to people. There were better ways to solve the situation between the two countries. The Americans decided to go with the modern, destructive way: one blow so its over. Innocent civilians suffered; though they werent part of the war. Only the soldiers should have been involved or been the ones that were injured. The atom bomb killed many people who shouldnt have been touched with the evil war. The Americans bombed out Hiroshima of retaliation for the tragic incident with Pearl Harbour. This wasnt the ethical thing to do because as we all know, two wrongs dont make a right. Though the human consequences were immense, the atom bomb, which unfortunately plunged down to Hiroshima, was worth the grief from the Japanese. Without the testing of the atomic weapon, the new age of sophisticated technology might not exist. Its true that we may not h...

Company Research of Wal-Mart Essay Example | Topics and Well Written Essays - 500 words

Company Research of Wal-Mart - Essay Example This means that 537 new international stores have been added to Wal-Mart's retail space. To enhance its international operations, the company has also experienced switch in leadership roles. Mr John Menzer is now in charge of US operations and several other divisions, while Mr Mike Dune currently heads international operations. In view of the recent developments, it can be seen that the company is seeking to grow externally as it focuses on its international operations. Moreover, Wal-Mart continues to have a positive outlook as it remains committed to the improvement of merchandise mix by constantly offering new products that target a wide market range. The firm also continues to control expenses as it implements various cost-cutting measures such as the recruiting of younger and healthier workers to save on healthcare cost. Given the company's strategy, I believe that continuous growth may be expected as Wal-Mart focuses on expanding internationally. With the firm's established brand equity not only in the US but throughout the world as well, it could easily capture a fair share of the overseas retail market. Accompanied by an appropriate financial strategy, the company's expansion binge may have a positive effect on the value of its shares. This conclusion is further supported by the firm's financial prudence.

Social Science Research Coursework Example | Topics and Well Written Essays - 1250 words - 1

Social Science Research - Coursework Example The drivers causing frustration (â€Å"frustrator†) wore a plaid sport jacket and white shirt while driving the high status car (hardtop), and an old khaki jacket while driving the low status car (old station wagon and old sedan). At the end of each trial, the subjects were observed whether they had honked once, twice, or not at all. Latency of each honk and estimated length were recorded and double checked against tape recordings. Manipulation checks were not used for the independent variable since there was no chance for the subjects and the researchers to interact. However, there was a questionnaire experiment conducted to verify the results between actual and predicted behavior. The results showed that the behavior reported in the questionnaire reflected what was observed in the field. The study employed probability sampling or representative samples. Subjects were selected to be representative of the population. Specifically, random sampling was utilized. This means that each driver in the population of interest has an equal likelihood of selection. There were 82 drivers observed. They are motorists taking some intersections in California. External validity is very well manipulated since the subjects are chosen and observed in real life settings. Among the 82 subjects, 26 were women and 56 were men. Their sex and estimated age were also noted. In addition, the year, make and model of each subject’s car were monitored. The experiment was conducted in six intersections in Palo Alto and Menio Park, California. A luxury car (1996 Chrysler Crown Imperial hardtop) was used as the high status car. Two low status cars ( a rusty 1954 Ford station wagon and an unobtrusive gray Rambler sedan) were alternately utilized. The driver of the experimental car was instructed to arrive at an intersection just as the traffic light was turning red. If at least one other car had come to a stop behind the experimental car when the

Concept Analysis Paper on Nursing Advocacy Essay

Concept Analysis Paper on Nursing Advocacy - Essay Example Historically, patient advocacy has been a moral obligation for nurses. During recent years, nursing literature has been focused on the advocacy role and nursing professions has adopted the term 'patient advocacy' to denote an ideal of the practice. Nurses assume that they have an ethical obligation to advocate for their patients. They also frequently describe their judgments and actions on behalf of a patient as "being a patient advocate. An examination of advocacy in the nursing literature reflects broad and at times different perspectives. Advocacy has been described in ethical and legal frameworks and, more recently, as a philosophical foundation for practice. It has also been described in terms of specific actions such as helping the patient to obtain needed healthcare, assuring quality of care, defending the patient's rights, and serving as a liaison between the patient and the health care system. Although multiple factors influence the need for advocacy, it is generally true that someone in the healthcare environment must assume the role of client advocate, particularly for the client whose self-advocacy is impaired. Generally, advocacy aims to promote or reinforce a change in one's life or environment, in program or service, and in policy or legislation. In healthcare delivery, these activities focus on health conditions, healthcare resources, and the needs of patients and the public. When nurses advocate for patients, they face certain risks and obstacles associated with the settings within which they work. Therefore, there is always the possibility that attempts to advocate for a patient can fail, and that nurses can experience many barriers when addressing the rights, choices, or welfare of their patients (Negarandeh 2006). The term "advocacy" has been used in nursing literature to denote a variety of nursing roles, each derived from a specific set of beliefs and values. The changing forms of advocacy may actually reflect the metamorphosis of nursing from the role of loyal, subservient handmaiden to autonomous health care provider. Strong yet diverse feelings regarding the appropriateness of nurses to be advocates are evident in the nursing literature and may stem from the use of one word label, "advocate," to represent several related and sometimes conflicting concepts. These concepts are defined as follows: beneficence-the principle of doing good; nonmaleficence-the principle of do ing no harm; unitary-transformative paradigm-a perspective that views human beings as unitary, self-organizing energy fields interacting with a larger environmental energy field; and utilitarianism-an ethical doctrine in which actions are focused on accomplishing the greatest good for the greatest number of people. Simplistic advocacy Mitty (1991) defined an advocate as one "who pleads the cause of another. She asserted that this role is implicit in the social contract between society and a profession such as nursing. She noted that although advocacy may occur at the individual or sociopolitical level, the underlying ethics guiding it varies from nurse to nurse. Ethics of justice might lead one nurse to advocate for a client's right to certain health care procedures, for example, whereas a nurse guided by an ethics of utilitarianism

The Importance and Role of Public Relations

The Importance and Role of Public Relations The art and social science of analyzing trends, predicting their consequences, counseling organizational leaders and implementing planned programs of action, which will serve both the organization and the public interest. (Asch and Solomon 1946) Public relations aim primarily to provide a communication between an organization and its users. It is one of the most important business functions as for any organization. It is essential to continually check its reputation in the market that it caters. Moreover, with the present climate of global extensions that majority of the modern day businesses practice, it is essential that the organization keeps touch with what it wants to portray to the consumers so that expectations from the organization is likewise. Public Relation is used to build rapport with employees, customers, investors, voters or the general public. Almost any organization that indulges itself in being portrayed in the public environment employs some level of public relations. Public relation is not limited to simply increasing awareness about an organization. It deals with other complex functions of checking and monitoring the reactions of its actions( Ahluwalia et al 2000). This illustrates what the organization reflects to its market hence aiding in deciding the next course of action as and when required. Publicity is one of the major tools for Public relations. Most; if not all, PR campaigns invest heavily for publicity. Publicity involves spreading of information for a product, person, service, cause or organization to gain public awareness. Publicity helps in effective PR planning and is one of the most viral methods adopted by any PR for an organisation. In present times, professionals commonly use technology as their main tool to get across their messages to target audiences (Collins et al, 1975). Traditionally, one of the oldest tools used by public relations professionals is a press/media kit. It is usually a collection of promotional materials for the purpose of circulation. These provide information about an event, organization, business, or even a person. Information also includes, fact sheets, press releases (or media releases), media alerts, brochures, newsletters, photographs with captions, copies of any media clips, and social mediums. In recent times, most organizations may have a website with a link which usually updates the message that is required to be communicated for the purpose of communication. Online version of such news is one of the essentials that is adopted in recent times. Other widely-used tools include brochures, newsletters and annual reports. (Basuroy et al 2003) In the recent times, technological uses of social networks, blogs, and even internet radio public relations professionals facilitate to directly send messages through their respective mediums. Methods are used to find out the reaction of the audience in the current market. Inquiring into the favorable appeals of the target audiences extensively include the use of surveys, conducting research or even focus groups. Various tactics are undertaken to attract target audiences by using the information gathered. This is then directed as a message to them using tools such as social or other popular mediums.`(Burrough and Bryan,2006) Increasingly, companies are utilizing interactive social networking options, such as media blogs, Twitter and Facebook, as tools in promotion for the PR campaigns. This can be credited to the fact that unlike the traditional tools, social media outlets enable the organization to engage in two-way communication, and receive relatively quicker feedbacks hence efficiently aiding in making accurate decisions. Reciprocal nature of communications Extracted from Effective Public Relations by Cutlip(2010) The above figure illustrates, communication is a reciprocal process of exchanging signals to inform, instruct, or persuade, based on shared meanings and conditioned by the communicators relationship and the social context. (Godes, 2004) NEGATIVE PUBLIC RELATIONS: Negative Public relation occurs under circumstances and situation when the message sent across to the public by the organization is seen not coherent to what it portrays. It may be expressed as that process which threatens the reputation and corporate identity of an organization due to improbable actions that leads to unlikely situations and circumstances. (Eliasberg et al 1997) However, this phenomenon can be either intentional i:e. (by an external source such as a competitor) or unintentional (inadequate research of an expected reaction or poor internal communications ). (Hueng et al,1982) Owing to the nature of this report, the researcher has chosen to consider only the unfavorable public relations for this study and thus Black public relations shall only be mentioned once. Thereafter, steps to deal only with unfavorable public relations shall be included for further part of this work. Intentional Negative Public Relations It indicates in context to incidences which are carried about by third party source with intention to tarnish the reputation of a targeted organization, these kind of intentional negative PR strategies are also known as Black Public Relations (James and Caryn 2006). It involves gathering information using high level of industrial espionage and competitive intelligence to uncover the targeted company secrets that are unfavorable to the organizations stakeholders (Hueng et al,1982). The only objective of such practices is to strategically disturb the channels and messages of communication between the organization and its shareholders. This kind of negative public relation is an unethical business practice yet it is been widely used against business rivals. (Grossmen et al1984) Unintentional Negative PR / Unfavorable Public relations. This is an occurrence under circumstances when an organization is facing a public challenge to its reputation. Generally these challenges may come in the following forms:- An investigation from a government agency. A criminal allegation. A media inquiry. A shareholders lawsuit A violation of environmental regulations Finally a violation in a number of other scenarios involving the legal, ethical and / or financial factors (Godes et al 2004). The above are challenges that an organization faces which may lead to an unfavorable Public relations situation for an organization. However, most of them can be contained almost immediately if handled with urgency. Generally, source of a negative Public relation is born out of mismanaged crises situation in an organization. Crisis communication is of utmost importance to contain any such unlikely circumstances. If efficiently handled, crisis communication can become the best defense against any issue turning into a fully blow catastrophe. An illustration to explain the above can be found in the case of Johnson Johnson. In 1982, after cyanide was discovered in some capsules of a JJ product Tylenol, J and J immediately announced a recall of an estimated stock of about a hundred million in circulation in its domestic market of the United States and other foreign market (Berger,2005). This decision of Johnson Johnson, to cooperate fully with the media, earned it lots of praises for its business principle of being socially responsible. The resultant was that the company received additional positive press coverage when it subsequently introduced its new tamper-resistant packaging. Similarly In March 2005, a woman bit into a finger while eating chili at Wendys. Wendys responded promptly and shut down that location. This was followed by carefully discarding all the other chilli that was dated as the controversial stock. The location was reopened only after a thorough investigation of the rest of the stocks.This crisis could have damaged Wendys image, but owing to it responding properly and appropriately, very little damage was observed to their image (Berger,2005). These are two of the few examples which illustrate efficient crisis management procedures despite not being in control the negative PR at the initial stages of the crisis. Johnson Johnson was able to gain positive publicity for the prompt decision making and was thus able to contain the situation before it went out of proportion. Conversely, many other organisations have shown lack in managing a crisis situation and have suffered for the same. Source Perrier is an example of such an organization that was unable to overcome negative publicity when its top management displayed poor crisis-management. Traces of benzene were found in the companys bottled water in 1990, however the company assured the public that it was only contained to bottles in North America. During the same time, scientists found traces of benzene in its bottled water which was being sold in Europe. This time, the management blamed it upon a contaminated filtering system an reassured that it was being tackled with utmost urgency. Never the less, media had then sampled the brands water from all its prevalent market and discovered that the situation had been persistent for a longer period of time and that the benzene laced product had been selling all around the world. The media questioned Perriers integrity and concern for public safety, and the company lost its dominant position in the marketplace; it has been unable to rebuild its reputation (Bogart and D ave 2001). The available literature on the source of negative PR is not coherently conclusive as different researchers have difference in the scope and width with regard to their view about the causes of unavoidable PR. Lerbinger (1997), attributes two causes i:e. management failure and environmental forces. He categorizes the two into eight categories of crisis situations which are as follows: Natural- for example Asian Tsunami which affected everything alike i:e. nations, government, corporations, businesses and so on. Technological- Mercedes A class had design faults thus had to roll over Confrontation- Shell Oil wanted to sink an oil platform into the North Sea and thus its petrol stations faced a consumer boycott. Malevolence-product tampering by private citizens, as in the case of Tylenol capsules of Johnson and Johnson Skewed Management- Barings Bank went out of business when the bank management was accused of turning a blind eye towards rouge trader Nick Leason. Deception Management misconduct- Enron Power Business and economic- Economic turmoil affecting businesses, hence organizations unable to live to the promise. (Lerbinger 1997) FEARN-BANKS FIVE STAGE OF CRISIS STAGE 1 Detection The organization is watching for warning signs STAGE 2 Preparation/prevention The organization takes notes of the warning signs and prepares plans proactively to avoid crisis, or reactive one to cope with the crisis if it is come. STAGE 3 Containment Taking Steps to limit the length of the crisis or its affects. STAGE 4 Recovery At this step, efforts are made to get back to normal operational conditions or effectiveness of an organization STAGE 5 Learning This is when the Organization reflects and evaluates the experience to consider the negative impacts for the organization and any possible benefits for the future. Fearns- Banks(2006), are amongst the school of thoughts that attribute Negative Public relation wholly to mismanaged crisis situation. In the table above, are the five stages of a business crises outlined that explain the steps to be ensured during different stages of a crisis. If attended to, the crisis management should be efficient and thus save the organization any unwanted harm to its reputation The most important efficient way of dealing with unfavorable public relation can be found in practicing crisis communication (Lerbinger 1997). Crisis communication aims at assisting an organisation to sustain continuity in the critical business processes. These business processes can be any information flowing during critical situations, natural calamities or event driven circumstances. The most commonly know five steps that must be ensured in situations threatening the PR of an organization may be best explained as the following Firstly, the corporation in crisis should be prompt and act accordingly. This can be achieved by addressing the public immediately following the discovery of the situation. Secondly, the corporation in question must maintain honesty as it is obliged to be completely truthful no matter what the consequences from the public may be. Thirdly, the corporation should be informative. This would require them to provide facts that are coherent with the situation and restrain speculation under any circumstance. The other reason for this step is to also assure that public does not create its own rumor as rumors might cause more damage to the organization as compared to the already worsened circumstance(Lerbinger 1997). Next, it is important to be socially concerned and illustrate efforts of improvement to the public. This would reflect on the business as being socially responsible hence improving chances of faster recovery from the damage incurred. Finally, maintaining two-way relationships. It is very essential as the corporation get response from the public hence increasing the chances of being accepted to do business with. More so, as this kind of communication shall project to the corporation directly about what is expected from them in the near future. These steps are essential in order to manage any crucial PR circumstances (Norton et al 2007). Quick response is the key to any negative publicity. Efficient and effective crisis communication strategy diagnosed in a premeditated manner can provide most of the solutions to problems relating to negative publicity. In this global and dynamic business world, technology can be effectively harnessed for communicating to the people about a rapid response to the issue. not only can this save the organizational reputation but also it can prevent any unlikely circumstances. Ensuring a co-ordinated response provides a stronger foundation to tackle tricky situations and in turn can result into a potential advantage to a range of potentially crippling scenarios. A well thought out and executed plan shall reflect strongly upon the management of the organsation hence, bringing some more goodwill amongst the users. Timing of responding is a critical factor as the longer the lag, higher the chances of a considerable losses to company revenue and reputation (Reinstein et al 2005). An Effectiive crisis communication strategy will typically consider achieving most of the following objectives: Maintain connectivity Be readily accessible to the news media Show empathy for the people involved Allow distributed access Streamline communication processes Maintain information security Ensure uninterrupted audit trails Deliver high volume communications Support multi-channel communications Remove dependencies on paper based processes (Norton et al 2007) Crisis communication can play a significant role by transforming an unexpected situation into a competitive gain. The only essential requirement is respond accordingly and immediately to the urgent situation. CONCLUSION This study is an attempt at understanding the concept of Public relations and investigates into the causes and sources of negative Public relations. In a theoretical context, literature on negative Public relation shows a very distorted view amongst the researchers as it lacks clarity in its core concept of whether is it a result of mis communicated Public message or is it a concept of deliberately damaging a organizations reputation owing to competition rivalry. However, all of these views are coherent on the thought that quick response to the critical situations can effectively deal with the arising unfavourable circumstances. Efficient and effective crisis communication strategy diagnosed in a premeditated manner can provide most of the solutions to problems relating to negative publicity. Source of a negative Public relation is born out of mismanaged crises situation in an organization. Crisis communication is of utmost importance to contain any such unlikely circumstances. If efficiently handled, crisis communication can become the best defense against any issue arising in the organization. Ensuring a co-ordinated response provides a stronger foundation to tackle tricky situations and in turn can result into a potential advantage to a range of potentially crippling scenarios. A well thought out and executed plan shall reflect strongly upon the management of the organsation hence, bringing some more goodwill amongst the users. Timing of responding is a critical factor as the longer the lag, higher the chances of a considerable losses to company revenue and reputation. Public relation also deals with complex functions of checking and monitoring the reactions of its actions as this illustrates what the organization reflects to its market. Thus regular contact with the public over the underlying issues provides better deciding power for the next course of action as and when required. Technology needs to be exploited the most in critical situations, in this modern day of vast technological choice, communication with the public is easier and cheaper than in the past Thus along with the prior mentioned five steps technological advantages should be used at it optimum to properly manage a crisis can as well as the six types of responses continue to be at the foundation of any crisis public relations.

Eye Strain as a Result of Computer Use :: Technology Computers Health Vision Essays

Eye Strain as a Result of Computer Use In the twentieth century, technology is at an all time high in the world. This technology includes research, stock market shares, computers, medical advances, and a vast variety of other things. Among the advanced technology is a break through of computer use. Almost everyone at sometime in their day is using a computer for one task or another. Computers have taken the world and reshaped the possibilities of ideas and dreams in the past decade. Millions of people are using a computer daily according to Anshel (1996). This work on the computer can ran range from five minutes a day to eight hours a day depending on they type of job a person holds. Today's job market, employees are accustomed to working with a computer. This could include data entry clerks, an internet consultant, a bank teller, a librarian, and especially secretaries. The field is open to just about anyone. Often overlooked are the students that use computers on a daily basis. Many college students depend on the use of computers classes whether it be for fun or recreational use. Sometimes the convience of using computers comes with a high price to pay. The National Institute of Occupational Health and Safety (NIOSH) says that eyestrain is the leading problem in computer use. This even exceeds such common problems as carpal tunnel syndrome. (Atencio 1996) Eyestrain and eye fatigue lead to many other complications if it is a continuous problem. One of these problems includes myopia. There are many ways of relieving eye fatigue and helping the symptoms of myopia. These problems can be onset in younger years when children are in school. Since most schools in the country are using computers as a main source of education, eyestrain can be a linked to myopia. There are many options people or companies have to improve the conditions under which the person is working. Eyestrain is defined as blurred or double vision, burning, irritation, headaches, gritty eye sensation, eye fatigue, neck and shoulder pain, color perception change, decreased visual efficiency, more frequent errors and reduced efficiency. (Atencio 1996, Palmer 1993, Nunoo 1997) Eyestrain is also known as asthenopia. It simply means visual strain. (Palmer 1993) Dr. Paul F. Bommarito also said that 88% of heavy computer users experience these problems. (Fletcher 1996) Palmer suggest that eye fatigue is often caused by the eye muscles becoming tired much like other muscles in our body.