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Low back pain ergonomics

Eyestrain basics

Viewing distance

Monitor placement and lighting

Hand and arm basics

Ergonomic products pros/cons

Being effective

Conventional vs. current wisdom

Ergonomic chairs

Alternative keyboards

A checklist

Good ergo weblinks

Good periodicals

Solving VDT reflections (Mark Rea)

About Checklists

Checklists as diagnostics and solution-finders aren't very successful, but they can be used as learning tools. 

Below is one that has been successful in helping people "sharpen their eyes" in looking for risk factors.  Possible solutions to each problem are also listed. 

And (surprise!) there are almost always SEVERAL ways to fix a given problem.  But remember our motto:  "For everything you fix, you probably screw up something else."

Things to look for

Possible solutions, (depending on further analysis)

Prolonged hunched or elevated shoulder while holding the phone

Telephone headset
Speakerphone

Elbows splayed out (shoulder abduction)

Lower worksurface
Lower chair armrests
Bring chair armrests in closer
Awareness and habit training

Raised or tensed shoulders Habit or tension training
Lower worksurface or keyboard
Lower chair armrests
Raise chair, if foot contact with
     the floor can be maintained

Twisting the head to the side

Bring viewed item closer to centerline of view

Elbow flexed for long periods using the telephone

Telephone headset
Speakerphone

Elbow or forearm resting for long periods on hard or shrp worksurface, chair armrests

Pad or round surfaces, corners, and armrests
Replace armrests
Telephone headset
Habit training

Wrists bent to the sides when using side key

Habit training
Keyboard with more accessible keys or split keyboard design

Wrists bent back (extended) or forward (flexed) for prolonged periods

Habit training
Palm rest
Lower, raise, or change slope
     of the keyboard

Wrists or palms resting for long periods on hard or sharp keyboard or work surfaces

Habit training
Palm rest
Padded or rounded surfaces, corners

Hands held actively over the keyboard during keying pauses

Habit training
Palm or forearm rest

Rapid, sustained, or prolonged keying

Greater work variety
Aggressive break schedule
Reduce overtime

Forceful keying, key pounding

Habit training
Light-touch keyboard

Significant amounts of hand stapling, punching, lifting, opening mail, or other forceful exertions, especially combined with awkward postures

Mechanical aids, such as electric stapler or punch
Reduce size of lifted loads
Bring heavy loads close to the body, at a medium height
Substitute sliding (worksurface) or wheeling (floor)
Sharpen letter openers

Prolonged mouse use

Greater work variety
Aggressive break schedule
Alternate hands
Alternative pointing devices
Arm support, including small table
Mouse close to body
     (extended keyboard tray)
Learn keystroke substitutes for
     menus

Prolonged sitting, especially in only one posture

Greater work variety
Aggressive break schedule
Chair that supports posture change, through movement, size, or easy adjustability
Habit training
Move phone and printer to the other side of the office to force standing, or suggest standing when on phone
Check chair fit
Monitor in-out mechanism
Sit-stand worksurface

Lumbar back area not supported

Lumbar cushion
Backrest height and tilt
Check chair fit, especially backrest/lumbar height

Feet dangling, not well supported, or a posture which seems to put pressure on the backs of the thighs

Lower chair
Lower worksurface
Habit training
Foot rest (last resort)

Chair backrest not used for long periods

Check chair fit, especially seat pan depth and height
Check leg room
Check monitor distance and character height
Habit training

Twisted torso

Rearrange work
Provide more knee space
U-shaped worksurface layout
Swivel chair

Frequent or prolonged leaning or reaching

Rearrange work
Mouse pad, palm or forearm rest
Bring mouse and keyboard
     closer to body

Working with one or both arms "reaching" toward a mouse or keyboard

Bring keyboard closer to body
Mouse pad, palm or forearm rest
Bring mouse closer to keyboard

Light sources that can be seen by the worker

Cover or shield light sources
Rearrange work arena
Lower other viewed objects
     to lower field of view

Reflected glare on the screen

Shield light sources
Shade screen
Glare screen
Move monitor so light enter from
    side angle, not back Do NOT tip monitor down
Lower light levels
Move light sources

Too much contrast between screen and surroundings or document; worker feels relief when bright areas are shielded

Lower ambient light levels
Turn off, reposition, or dim task lights
Block offending light sources
Change screen polarity to black on white

Very bright ambient lighting (above 500 lux or 50 fc) or shadowed areas caused by over-illumination

Lower ambient light levels to 200-500 lux (20-50 fc) and use task lights

Monitor closer than approximately 65 cm (25")

Push monitor back (enlarge font size)
Habit training for reclining
Computer glasses
Bring keyboard forward, possibly
     with a keyboard tray

Different viewed objects (screen, documents) at different distances from the eyes

Use document stand or otherwise equalize distances to within about 10 cm (4") if rapid viewing changes are required

Screen or documents not oriented perpendicular to the line of sight (tipped back slightly is even better)

Change monitor, document stand
     angle

Prolonged near focusing throughout the day with few far-focusing opportunities

Move monitor back as far as possible
Habit training
Rearrange space to provide view
Introduce glazing

Monitor image dim, fuzzy, flickery, small, or otherwise difficult to read

Upgrade monitor
Use software to enlarge image

Shiny, low-contrast, or small-print documents

Improve lighting on documents if
     documents cannot be changed

Forward head posture (peering) or squinting

Lower monitor
Tilt monitor back
Check for monitor image quality
     problems, character height or monitor distance
Suggest consultation with vision
     specialist

Eyestrain complaints

Check all aspects of visual
     environment
Suggest consultation with vision
     specialist

Neck extended backwards, head tilted back, even slightly

Remove CPU from under monitor
Remove tilt-swivel base from
     monitor (leave ventilation space)
Check for bifocals and suggest
      full-frame "computer glasses"
      prescription

Neck severely flexed (downward)

Tilt face of monitor back
Tilt document - do not lay flat on worksurface
Raise document or monitor to a
     comfortable height
Adjust posture
Habit retraining
Check glasses for proper prescription