Computer Related Health Hazards

unclesamnorweiganΤεχνίτη Νοημοσύνη και Ρομποτική

18 Οκτ 2013 (πριν από 4 χρόνια και 8 μήνες)

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Computer Related Health Hazards

Research Topics

Repetitive Strain Injuries

Carpal Tunnel Syndrome

Eye Strains and Computer Vision Syndrome

Internet Addiction

Stress and Depression


Carpal Tunnel Syndrome

Carpal Tunnel Syndrome (CTS) is a Repetitive Stress
Injury (RSI) caused when the median nerve is pushed by
the flexor tendons inside the tunnel made up of the wrist
bones, or carpals.

How is CTS caused

The forearm flexor tendons and a few nerves pass through
a small tunnel formed by the wrist bones, or carpals, into
the hand. As you move you hands and fingers, the flexor
tendons rub against the sides of the tunnel, sometimes
causing them to swell and push the median nerve. When
the median nerve is pushed by the tendons, we feel pain.

Symptoms of CTS injury

Pain that may run up the hand into the wrist and arm

Numbness and coldness in the hands

Loss of strength and/or joint movement

Discomfort and stiffness in the hands

The need to massage your hands, wrists and arms

Swelling and coldness in the hand

Reasons for CTS injury

Stress will increase muscle tension causing pain

Long hours in the keyboard, especially those that type
more than four hours

Lack of circulation in the muscles that prevents nutrients
and oxygen to reach the tissues

Inadequate rest and breaks

Genetic predisposition due to the amount of lubrication of
the flexor tendons that one receives and the tunnel's

Other health problems like diabetes and rheumatoid

Poor posture including the sitting, placement of hands on
the keyboard and proper height of the keyboard

Poor diet (lack of vitamins)

CTS Treatment

Rest, rest and more rest

Use of a wrist brace or splint

Take medication like ibuprofen

Cut back on sugar, caffeine, alcohol and take vitamins

Keep hands warm, take breaks, exercise your hands and

Correct your typing and use your knowledge of

Surgery should be your last retreat if everything else fails

Eye Strains

Eye strain is the single largest complaint of VDT users
causing soreness, irritation, blurred vision, redness,
dryness and tenderness of the eyes.

Symptoms of Eye Strains

Impaired vision, double vision and blurred vision

Difficulty looking at one point for a period of time

Itchy dry eyes and discomfort while looking at the VDT


Eye fatigue that can have serious impact later in life

Reasons for this injury

Bad monitor resolution, flickering, or glare at the monitor

Poor lighting conditions in the computer room

Electromagnetic radiation emitted by the VDT (UVA)

Staring at anything for a long period of time will cause
blurred vision

Loss of negative ions in the atmosphere due to electrostatic
charges on the face of the CRT

Eye Strain Treatment

Use your knowledge of ergonomics

Take breaks when you feel strained

Use your laptop when possible because the monitor emits
less radiation

Adjust the brightness of your screen

Wear protective eye glasses

Internet Addiction

Use Internet every day without days off

Loosing track of time while surfing the Net

Staying home more loosing social contacts

Denial of high usage

51% of Internet addicts suffer severe job impairment

58% get addicted within the first 12 months of Internet

Stress and Depression

Computer operators experience more stress than any other
occupational group the National Institute of Occupational
Safety and Health has studied

Other Computer Related Health Hazards

Back problems (pain) caused from the efforts of the
muscle to hold your posture for long periods of time

Skin rashes that are caused from the static fields in front of
the screen causing ions and pollutants in the air to become
positively charged and attach themselves to your
negatively charged skin (especially in low humidity)

Abnormal reproductive outcomes (?) due to
electromagnetic radiation's affects on biological functions
and biochemical processes inside our cells

Cancer and leukemia (?)

Skin aging (?)


Ergonomics, the "science of work," is a field of technology
that considers human capabilities and limitations in the
design of machines and objects that people use, the work
processes that they must follow, and the environments in
which they operate."

A few ergonomic advice

Use a chair that has full support of your back, is adjustable, and has a
footrest and armrest

Place your feet firmly on the floor

Use an ergonomic keyboard that is angled or can split to enjoy a more
natural typing position

Use a wrist rest that is comfortable

Place your hands straight when typing, the angle of your forearm and
upper arm should be 90 degrees

Sit 24 to 28 inches away from your monitor

Place the monitor 15
30 degrees below your straight
ahead line of sight

Keep your body away from the sides and backs of monitors to reduce
the exposure of radiation

Avoid glare on your monitor (do not have strong sources of light in
your back) and use screens that minimize glare

Use the proper light in your work environment that is compatible with
the monitor frequency