Healthy Computer Practices Are Important
Computers have become a wonderful learning tool for children in our
classrooms, and most are able to continue their work on computers at home. In
some cases, children spend hours working on a project or exploring the Internet
for educational purposes. We all feel encouraged when children are engaged in
learning, but it’s important not to let them get carried away.
Computer research and exploration provide great opportunities
intellectually, but they can pose some physical problems unless certain
precautions are taken. These tips are valid for computer users of all ages.
First, remember that extended computer work can take its toll on eyes.
Have users shut their eyes every few minutes to rest them for a second or two.
Every 15 minutes or so they should look away from the screen and focus on
something in the distance.
To keep eyes from drying out, users of all ages should be reminded to
blink. Make sure the screen is clean and the view settings are adjusted so that
items are large enough to be seen without squinting.
The physical position of the computer is also important. The top of the
computer screen should be positioned approximately at eye level, with the
midpoint of the screen four to nine inches below eye level. The viewing angle
should be slightly downward, with the screen about an arm’s length away.
Chairs should be adjusted so that feet can rest squarely on the ground,
with thighs parallel to the floor, forming a right angle to the back. Keyboards
should be at a height that permits elbows to form slightly relaxed right
angles. Wrists should be held straight not flexed up or down.
Children and short adults may need a footrest to position their feet. A
monitor might need a phone book underneath it to reach proper height.
Posture is also important. Users should avoid hunching forward or
slumping down. They should be encouraged to maintain a gentle touch when
typing. Striking the keys with enough force to make a racket increases the risk
of injury. Likewise, they should go easy with a mouse.
All experts agree it’s important to take periodic breaks from computer
use. Users should be encouraged to stand up and stretch every hour or so. This
is good advice for all of us.