Apple LC 575 manual Eye fatigue, Arranging your office

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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 office

Here are some guidelines for adjusting the furniture in your office to accommodate your physical size and shape.

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.

mWhen you use the computer keyboard, your shoulders should be relaxed. Your upper arm and forearm should form an approximate right angle, with your wrist and hand in roughly a straight line.

You may have to raise your chair so your forearms and hands are at the proper angle to the keyboard. If this makes it impossible to rest your feet flat on the floor, you can use a footrest with adjustable height and tilt to make up for any gap between the floor and your feet. Or you may lower the desktop to eliminate the need for a footrest. Another option is to use a desk with a keyboard tray that’s lower than the regular work surface.

Setting Up 9

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Contents Getting Started Apple Computer, Inc Contents Iv Contents Installing System SoftwareMove the computer farther away from the television or radio Communications regulation informationClass 1 label Exposure. sSetting Up Socket end of the power cord Setting UpPlugging in the computer ADB port Connecting the mouse and keyboardPower key Computer. The top of the switch is marked with anProblems starting up? Safety instructions Health-related information about computer use Musculoskeletal discomfort Arranging your office Eye fatigueAvoiding fatigue Shoulders relaxed Forearms and hands in a straight lineForearms level or tilted up slightly What’s next? Use your hand to scoot the mouse along the table Learning the BasicsBy the way Macintosh HD stands for Macintosh hard disk Put the tip of the arrow inside this picture Now your screen should look like the following illustration Turning the computer on and off Click Shut Down Shutting down the computer with a menu commandPress the Power key marked with the P icon on the keyboard Turning on the computerOptional Use these buttons to Change the volume Computer’s soundOn adjusting the keyboard height Guide for information onYour Computer at a Glance You can use the screwsAdjusting the sound Special FeaturesSound control buttons Using the Sound control panelAdjusting the screen Using the Screen control panelScreen control buttons Disabling the buttons on the front of your computer Saving energy Installing an expansion card Using the built-in microphoneTo install an expansion card Continues Slide the logic board back Replace the back panel of the computer Using a RAM disk for temporary storage Using memory efficientlyConnecting to a network Starting up your computer from an external hard disk Using a modemInstalling System Software Installing System SoftwareIf you see a blinking question mark on your screen Using the CD as your startup deviceIf you see the Macintosh desktop Reinstalling system software On the desktop, click Install SystemWelcome dialog box that appears, click OK Installer dialog box, click Install Custom installationsOn the desktop, click the Disk Images tab Click a button to select the disk image you want to copyClick Disk Images Dialog box that appears, click Make a Copy Open the Applications folder Copying the Macintosh Basics tourApple Publishing System
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