talk about impacts of using computer?

1. Positive effects of computers on human life
Internet gives people the opportunity to receive the latest news, rumors, information about the issue of interest. Allows us to play exciting and exciting online games.
Video conferencing enables people to conduct meetings, exchange information, solve critical issues without leaving their work place, save time and money.
Also on the Internet, we can find high-paying jobs that bring us satisfaction. Can quickly deliver, receive documents, quickly exchange information for work.
Online shopping is also easier: the price is usually cheaper than at the store, you can read the description of the product, see the product image, check the product's feedback. other customers. You can buy cars, search for tours, shop for baby toys, or buy items that are half way around the world.
The Internet is also a means of connecting with friends, helping to keep the forgotten relationships of their peers, the coincidental people who know each other.
Nor should it forget its important role for the disabled, who do not have the opportunity to interact directly with the world.
For all of us, the Internet opens the way to other cultures and histories, providing enormous opportunities for education, an immense source of knowledge that no library can match.
And the first is also the last, the computer has become a very effective tool for us, it replaced the old typewriter, replaced the pen and gave us The modern tools make the work more convenient and simpler.
2. The harm of computers
The main factors that harm the health of computer workers: sitting posture for a long time; electromagnetic radiation of the computer screen; eyestrain; overloaded hands; Dependent on the computer.
Seated: It looks like we are sitting comfortably on our computer, but in reality it's uncomfortable and uncomfortable for the body: the neck, the head, the arms and the shoulder are pulled. tension, which leads to overloading of the spine, cartilage degeneration with adult and scoliosis with children.
Electromagnetic radiation: Modern computer monitors have been designed with protective layers to reduce this damage, but of course, they are reduced, not eliminated.
Impact on vision: Our eyes must constantly react to changes in the screen of text or images, causing eye fatigue and reduced visual acuity. The selection of colors, text, components of the program window irrational also adversely affect the eye. For eye protection, we should follow some guidelines after working with computers:
- Distance from eyes to screen 50-70 cm;
- Do not work with computers in the dark;
- School-age children should only sit 10-20 minutes behind the computer, then rest and relax their eyes. If you have vision problems, wear glasses when working with a computer.
Overloading of the joints of the hands: The nerves of the fingers are constantly affected when you press the keyboard, leading to numbness, weakening. This can harm the joints and ligaments of the hands, and if left untreated may lead to chronic hand pain.
Computer Dependency: Perhaps this is the hottest problem for the modern world, especially for teenagers of our time. That is when computers are not only an information source, a tool for human needs, but it begins to replace the surrounding world. Gradually people spend more time on their computers, burying their heads in games or online communications, forgetting real life as well as real communication. In particular, for children, insufficient psychology, some games or information on the Internet can change the worldview as well as the concept of moral standards of children. In some serious cases it can lead to psychological disorders.

3. Protect your health when working with computers in work or school:

* Machine room must meet the corresponding conditions:
- The tables and chairs are comfortable and well organized (preferably a dedicated computer desk and adjustable height benches, so that the natural light can be projected from the left and the front.
- Temperature and ventilation mode: ideal temperature is in the range of 19-200C, relative humidity of 50-60%, using air conditioning and ventilation fan,
- Light (can combine natural and artificial light, should use curtains)
- Noise control (not excessive, should limit the number of photo equipment, scanner and printer),
- Cleaning the machine room (daily cleaning of the machine room)
- Machine Room (using non-shining paint colors, bright colors for furniture, walls, floors and ceilings),
- There should be technical safety instructions in the machine room, posture recommendations and continuous work time