CS, IT Occupational Hazard

Transcription

1 CS, IT Occupational Hazard Ergonomics patients average age of 38.5 years. 63% females. 70% computer users, 28% musicians, 2% were others engaged in repetitive work. A majority sought care within 30 months many before 12 months. 59% still working despite increasing pain and symptoms: weakness, numbness, tingling, and stiffness. Pascarelli E.F., and Hsu YP, Work-Related Upper Extremity Disorders:Journal of Occupational Rehabilitation, 2001 Visual problems 76%, musculoskeletal problems 76.5% ( of 200). Gradual increase in visual and musculoskeletal problems with hours spent for working on computers daily. Visual problems less with antiglare screen, and adequate lighting. Musculoskeletal problems were significantly less using cushioned chairs and soft keypad. A Study of Visual and Musculoskeletal Health Disorders among Computer Professionals in NCR Delhi, Talwar, R., Kapoor, R. Puri, K., Bansal, K., and Singh, S., Indian J Community Med

2 Computer Usage Ergonomics Ergonomics 2 The craft of working smarter, longer, healthier. Symptoms Eyes tired at end of day Neck and shoulders often stiff and sore Pain or discomfort in back Tingling, numbness or pain in forearms, wrists or hands Stomach aches or indigestion Legs stiff and cramped or swelling and numbness in ankles and feet. Victims Data processing personnel Software engineers, programmers, system administrators, IT,...

3 Environment Ergonomics 3 Top of display at or below eye level. Monitor distance18 to 30" No reflective glare on screen Maximum screen brightness w/o blurring Wrists straight and relaxed Back rest snug against lower back Head and neck upright Forearms parallel to floor 3-6" legroom lap and desk Feet forward o Feet rest on floor

4 Repetitive Strain Injuries: Carpal Tunnel Ergonomics 4 Jobs requiring rapid and prolonged keyboard can generate 200,000 keystrokes a day (10 miles). Flexing wrist forward strains muscles & tendons Extending wrist backwards strains muscles & tendons Twisting wrists to side strains nerves and tendons Sitting posture affects wrists and hands.

5 Micro Breaks Ergonomics 5 Take a break, stand up, walk around at least once an hour - your desk. Wrists and hands Spread fingers apart, hold 5 seconds, 5 reps. Rotate wrists with fingers relaxed and elbows still. Turn palms up then rotate down. 5 reps. Dangle hands and shake up - down, sideways. Not hard, repeat until no tension.

6 Body & Eyes Ergonomics 6 Reach over head with fingers stretched. Hold 5 seconds, 5 reps. Roll shoulders forward 5 times, backwards 5 times. Squeeze shoulders with forearms and hands raised. Hold 5 seconds 5 reps. Drop your arms and hands to side shake gently 5 seconds, 5 reps. Cup hands over closed eyes hold a minute while breath slowly & deeply.

7 Ergononic Devices Ergonomics 7 D. Engelbart's original 1963 mouse was block of wood. (1983 prevalent mouse use started.) Mice are known to cause shoulder problems and "mouse fingers" (tendinitis). Mouse (and peripherals) are now highly researched and tested. Devices need to studied in the context of their actual use, not optimal designed use.

8 Blue light Ergonomics 8 Ever notice how people texting at night have that eerie blue glow? Or wake up ready to write down the Next Great Idea, and get blinded by your computer screen? During the day, computer screens look good they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at the sun. f.lux control the lighting of your display by time of day Short-wave blue light emitted by most tablets, smartphones, and TVs has suppresses melatonin, a hormone that normally helps you drift away into slumber. A 2013 Mayo Clinic study found that holding your device at least 14 inches away from your face reduced the amount of blue light you absorbed and eliminated its effect on melatonin. Also try dimming your screen or switching to the black background when you're reading, which will give off less sleep-disturbing light.

9 Eye strain, light, display settings Ergonomics 9 Ambient lighting should be about half as bright as that typically found in most offices. Eliminate exterior light by closing drapes, shades or blinds. Reduce interior lighting by using fewer light bulbs or fluorescent tubes, or use lower intensity bulbs and tubes. Position your computer monitor or screen so windows are to the side, instead of in front or behind it. Adjust the brightness of the display so it's approximately the same as the brightness of your surrounding workstation. Text size should be three times the smallest size that you can read from your normal viewing position. The best color combination is black text on a white background. Set the highest refresh rate (75 Hz or higher). Blink more, consider eye drops Look away , every 20 minutes look 20 feet away for 20 sec. contact lens users more computer vision syndrome symptoms than users with eyeglasses or no corrective lenses.