Apple 500 Series manual Eye fatigue, Arranging your work area and equipment, Chair

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Eye fatigue

Eye fatigue can occur whenever the eyes are focused on a nearby object for a long time. This problem occurs because the eye muscles must work harder to view an object that’s closer than about 20 feet (6 meters). Improper lighting can hasten the development of eye fatigue. Although eye fatigue is annoying, there’s no evidence that it leads to permanent damage.

Whenever you’re engaged in an activity that involves close-up work—such as reading a magazine, doing craft work, or using a computer—be sure to have sufficient glare-free lighting and give your eyes frequent rest breaks by looking up and focusing on distant objects. Remember to have your eyes examined regularly.

To prevent discomfort and eye fatigue:

mArrange your work space so that the furniture is properly adjusted for you and doesn’t contribute to an awkward working posture.

mTake frequent short breaks to give your muscles and eyes a chance to rest.

Arranging your work area and equipment

The suggestions in this section can help you work more comfortably with your computer.

Chair

mAn adjustable chair that provides firm, comfortable support is best. Adjust the height of the chair so your thighs are horizontal and your feet flat on the floor.

The back of the chair should support your lower back (lumbar region). Follow the manufacturer’s instructions for adjusting the backrest to fit your body properly.

Health, Safety, and Maintenance Tips

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Contents User’s Guide Apple Computer, Inc Contents Power Management Index Communications regulation information Vcci statement Trackpad button Plugging in the computer Getting StartedWhen you are ready to begin Opening the display To turn on the computer for the first time Turning on the computerProblems turning on your computer? What’s next? Learning the basics Tips for using the trackpad Learned from the tutorial Reviewing the basicsTurning the computer off Automatic sleep Putting the computer to sleepRestarting a computer that’s already on User’sGuide Where to find answersGetting Help Getting answers to your questions Getting answers with the Topics button Now continue with the next section Getting answers with the Index button Read and follow the instructions in the window Getting answers with the Look For button If you want to close Macintosh Guide, click here Tips for using Macintosh Guide Identifying objects on the screen Main Macintosh Shortcuts window appears Learning useful shortcutsClick one of the category buttons Connecting Additional Equipment Connecting a modem Connecting a printerExternal modem is ready to use Terminator Connecting Scsi devicesConnecting your computer as a Scsi disk Using your PowerBook as a Scsi diskTurn on the PowerBook by pressing the Power On key Simplifying the connection process Quitting Scsi disk mode Drawing battery power in Scsi disk modeConnecting an external monitor Video port Video adapter Video cable Trouble? Working with an external monitor Disconnecting an external monitorConnecting sound input and output devices Adding memory to your computer Connecting other devicesInstalling application programs Installing and Using Application ProgramsFinding out which programs are open Switching programsWorking with several programs at a time Hiding and showing windows on the desktop Backing up your filesPower sources Power ManagementWhat you should know Responding to low-power messagesWhat you should do Recharging the batteries To remove or replace the batteries, follow these steps Removing or replacing the batteriesPower Management Maximizing work time Maximizing the life of batteriesHealth-related information about computer use Appendix a Health, Safety, and Maintenance TipsMusculoskeletal discomfort Chair Eye fatigueArranging your work area and equipment Keyboard and trackpad Built-in display MouseExternal monitor Avoiding fatigueWhat about electromagnetic emissions? Important care and safety instructions Appendix a Caring for batteries Handling floppy disks Traveling with the PowerBook Service and support Storing the PowerBookAppendix B Using Your Keyboard Control key Index Index Index Index PowerBook Troubleshooting Guide See Scsi Y, Z Apple Publishing System