Best Setup Of Keyboard To Prevent Wrist Injuries

       1. If you don't currently use an adjustable keyboard/mouse tray, consider attaching one to your surface.

This allows a much wider range of adjustment, and helps you maintain a proper ergonomic setup. Choose a system that is height adjustable, lets you tilt the keyboard away from you slightly for better posture (negative tilt), and allows you to use the mouse with your upper arms relaxed and as close to the body as possible.      2. Make sure the height of your keyboard allows you to keep an "open angle" with your arms. In the proper position, the keyboard should be placed just above the level of your lap. This is lower than most people normally place their keyboard, but lets your arms tilt downward while using the keyboard, leaving your elbows at a comfortable "open" angle. (If you don't have an adjustable keyboard tray, you may need to accomplish this by adjusting your chair height).    3 . If your keyboard is lower than the desk surface, tilt the back edge of the keyboard slightly down (known as "negative keyboard tilt"). Using a slightly negative keyboard tilt will help you keep your wrists in the proper (neutral) position. Try to avoid positive keyboard tilt (i.e., where the top row of keys is noticeably higher than the bottom row of keys). Also, make sure that if there are "legs" attached to the bottom front of your keyboard, they are left un-extended. 4. If you use a keyboard tray, make sure there's enough room for your mouse. Your mouse should be close to your keyboard so that you don't have to reach far to grasp it.

The Position Of Chair While Using Computes

	Adjust the Recline    If the chair has a recline lock, set this at a comfortable position. Remember to unlock this periodically; this will allow the backrest to move with your back as you change posture. It's generally better to be slightly reclined, as this helps relieve tension from your lower back. If the chair allows you to, adjust the recline tension as you move back and forth so that the chair provides consistent support.
	Adjust the Seat Pan    When sitting back, make any adjustments to the seat pan (e.g., seat pan tilt) to reach a comfortable position. The seat pan should extend about an inch on both sides of your legs, and should not apply pressure to the back of your knees.
	Adjust the Armrest    If possible, adjust the height, width, and position of your armrests to one most comfortable for how you work. Keep in mind that armrests will be used only between typing sessions, not while typing or using your mouse. Consider lowering or swinging the armrests out of the way when not in use so as to not inhibit your movement.
	Clear Obstacles    Make sure that the chair's casters (wheels) move smoothly, and that nothing obstructs your ability to  position the chair in front of your desk and computer.

How To Hold Mouse In Proper Way?

 1.Hold the mouse loosely. "White knuckling" the mouse creates too much tension. Use a light touch when you click.

 2.Use you whole arm and shoulder to move the mouse, not just your wrist. Don't rest your forearm on the desk while you move the mouse.

 3.Do not lift your "pinkie", use all of your fingers to lightly hold the mouse.

 4.Keep your wrist relaxed and neutral, not bent. The click button should be about the same height as your keyboard.

 5.Avoid prolonged postures. Rotate your shoulders, gently shake your hands and fingers four or five times per hour.

 6.Left handers should use a "left handed" mouse, or configure the mouse to work best with their different (mirror image) hand shape. 

Social Problems Related To Internet and Computer Use

1.Excessive use of Internet can cause addiction to pornography and also can lead youngsters to the wrong path.
2.Spend more time in online gaming can cause addiction and sleeping disorder.
3.People who spend more time in Internet will be neglecting from family and friends.
4.People also can easily exposed to online predators.

Proper Posture During Computer Use

Best Ergonomics Applications

Desktop Computer Ergonomics
1. Ensure the chair back is adjusted so that your upper body is relaxed and supported.

2.Ensure your wrists are not bent, use a wrist-rest (sometimes supplied as part of a keyboard, or can be

purchased for £6 from stationers, computer shops, Argos)

3.Double-check that your forearms are horizontal and wrists are straight when your hands are placed on the keyboard. With your shoulders relaxed the bottom of your elbow should be at desk height.

Conditions Caused By The Improper Use Of Computers

Repetitive Strain Injury (RSI)

• RSI describes a group of syndromes that affect tendons, nerves and muscles and lead to pain in the arm, neck and shoulders. They are caused by poor posture that results from muscles remaining tensed for long periods. Syndromes categorized under RSI include Tendonitis, Stenosing Tenosynovitis, Tenosynovitis, DeQuervain's Syndrome, Trigger Finger/Thumb, Reflex Sympathetic Dystrophy Syndrome, Intersection Syndrome, Thoracic Outlet Syndrome and Carpal Tunnel Syndrome. These are all interrelated, and a person may suffer from multiple conditions at the same time.

  Carpal Tunnel Syndrome

  • Carpal Tunnel Syndrome is the most common condition classed under RSI. It is associated with pain, numbness or tingling in the wrists and hands, with symptoms worsening at night. Ordinary keyboards require hands to be close together when typing, and irregular hand and wrist positioning. Recommended treatment or prevention measures involve frequent breaks during computer use, stretching techniques, or using an ergonomic keyboard. Extreme cases cause restriction in simple hand and wrist movements and may require surgery.

  Computer Vision Syndrome

  
  

  • This is the most common condition in computer users. It is usually caused by long, uninterrupted periods of focusing on the computer screen. Symptoms include eye fatigue, painful and/or teary eyes and headaches. Regular blinking and eye rest, corrective lenses and a diet rich in eye nutrients such as beta carotene are recommended to alleviate symptoms.

    Eyestrain and VDT's  
    

    Eyestrain is another ergonomic problem frequently associated with the use of computers and Video Display Terminals (VDTs). Keep in mind that the solutions presented here are only recommendations. If following these recommendations seems to make matters worse, try something else! If you aren't experiencing headaches or eyestrain while you work at the computer, don't worry about making changes; obviously your setup works for you. As the saying goes, "you don't need to fix what isn't broken."