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Computer workstation safety


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Computer workstation safety

  2. 2. DEFINITION • ERGONOMICS is a way to work smarter -not h d b d i i f t l i t kharder by designing of tools, equipment, work stations and tasks to fit the job to the worker - NOT th k t th j bthe worker to the job: – Layout / type of controls & displays – Lighting & Temperature Process (Heights reaches weights)– Process (Heights, reaches, weights) Ergonomic and administrative controlsg can address these problems
  3. 3. Risk Factors Awkward Positions • Leaning forward at your desk • Typing with wrists at an odd angle • Raising shoulders while typing • Reaching to use mouse • Twisting neck to look at monitor or phone • Lifting objects from below waist or above shoulders Excessive Force • Typing with too much force or “pounding” the keys • Stamping
  4. 4. WORKSTATION HAZARDS • Problems associated with computer workstations Eyes and vision– Eyes and vision • Glare • Visual fatigue – Musculoskeletaluscu os e e a • Simple muscle fatigue or neck and back acheache • Cumulative trauma disorders (CTD) – Carpal Tunnel syndrome (CTS) andCarpal Tunnel syndrome (CTS) and Tenosynovitis
  5. 5. EYES AND VISION PROBLEMS • Symptoms include – Visual fatigue, blurred or double vision, burning and tearing eyes,Visual fatigue, blurred or double vision, burning and tearing eyes, headaches and frequent changes in eyeglass prescription. • Controls To Avoid Glare – Keep the monitor at an angle to prevent light source from shining on the screen and washing out characterso t e sc ee a d as g out c a acte s – Use blinds, drapes or shades to block glare from windows – Avoid light colored clothing – Use a micromesh antiglare filter on the screen to scatter and absorb light or use a neutral density filter to scatter and diffuse lightg
  6. 6. EYES AND VISION PROBLEMS • Causes of visual fatigue – Staring at the screen without varying eye position or focus – Dry eyes caused by infrequent blinking or low humidity (below 40%) – Maintaining a viewing angle that is above the horizong g g – Poor image quality due to improper display • Controls To Avoid Visual Fatigue Exercise the eyes by periodically focusing on objects at varying– Exercise the eyes by periodically focusing on objects at varying distances – Keep the screen and document holder at the same distance from the e esthe eyes – Practice blinking regularly – Adjust the brightness control for comfort – Keep the screen clean – Consult an optometrist regarding special lenses or the use of bifocals have regular eye examinations and indicate the distancebifocals, have regular eye examinations and indicate the distance from your eyes to the monitor
  7. 7. MUSCULOSKELETAL PROBLEMS • Musculoskeletal complaints regarding muscularp g g fatigue or cumulative trauma disorders (also called repetitive stress injuries RSI).p j ) • Muscular conditions that result from repeated motions formed in the course of normal work ormotions formed in the course of normal work or daily activities due to improper ergonomics • Examples include:• Examples include: – Carpal Tunnel Syndrome T i Elb– Tennis Elbow – Trigger Finger
  8. 8. MUSCULOSKELETAL PROBLEMS • Symptoms of CTDs: – Tingling or numbness in the hands or fingers – Pain in fingers, hands, wrists, or even shooting up into the arms or forearms – Loss of strength or coordination in the hands – Numbness or discomfort in the hands which wakes you up at night • Control of musculoskeletal problems – Utilizing the ergonomic potential of your work station Furniture unit design and properstation. Furniture, unit design and proper technique often go hand-in-hand – Administrative controls- proper computer set up, monitor positioning rest breaks and projectmonitor positioning, rest breaks and project assignment – Engineering or ergonomic controls (i.e., furniture d i t k t ti fi ti ddesign, computer workstation configuration and layout).
  9. 9. HAZARD CONTROLS Engineering techniques are the preferred mechanism for controlling ergonomic hazards. This may entail redesigning the work station, work methods, and tools to reduce the • demands of the job, such • as exertion, repetition, and, p , • awkward positions. Administrative Controls such as: • Rotating personnel to jobs with dissimilar physical requirements • Establishing work/rest schedules • Training personnel to use appropriate work methodsg p pp p when engineering controls are not feasible
  10. 10. 12 tips for an Ergonomic Computer Workstation* 1. Use a good chair with a dynamic chair back and sit back in this 2 Top of monitor casing 2-3" (5-8 cm)2. Top of monitor casing 2-3 (5-8 cm) above eye level 3. No glare on screen, use an optical glass anti-glare filter where needed 4. Sit at arms length from monitor 5. Feet on floor or stable footrest 6. Use a document holder, preferably in-line with the computer screenwith the computer screen 7. Wrists flat and straight in relation to forearms to use keyboard/mouse/input device 8. Arms and elbows relaxed close to body 9. Center monitor and keyboard in front of you 10 U ti tilt k b d t ith10.Use a negative tilt keyboard tray with an upper mouse platform or downward tilt able platform adjacent to keyboard 11.Use a stable work surface and stable (no( bounce) keyboard tray 12.Take frequent short breaks (micro breaks) * - Cornell University
  11. 11. Helpful Tipsp p • Provide a 15 minute break for every two hoursy of continuous computer use • Alternate work taskste ate o tas s • Use a stretching routine to relax the body • Keep the mouse at keyboard level• Keep the mouse at keyboard level • Do not grip the mouse tightly H ld th li htl ith ll fi• Hold the mouse lightly with all fingers • Click gently