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From: hallett@hamlet.steinmetz (Hallett)
Newsgroups: comp.sys.mac
Subject: Re: SE display bug survey results (medium long)
Message-ID: <6829@steinmetz.steinmetz.UUCP>
Date: Tue, 28-Jul-87 08:30:10 EDT
Article-I.D.: steinmet.6829
Posted: Tue Jul 28 08:30:10 1987
Date-Received: Wed, 29-Jul-87 05:48:24 EDT
References: <409@sdacs.ucsd.EDU> <1370@apple.UUCP>
Sender: root@steinmetz.steinmetz.UUCP
Reply-To: hallett@hamlet.UUCP (Hallett)
Organization: General Electric CRD, Schenectady, NY
Lines: 39

In article <1370@apple.UUCP> ems@apple.UUCP (Mike Smith) writes: 
>This is not meant as a joke, a casting of doubt, or in any way as a 
>cute or 'smart' remark.  It is meant totally as a searching for truth.  
>
>I have noticed a tendency for my Mac+ screen to wiggle after a while.
>For me, at least, this is an optical illusion.  I sat down and put
>put the edge of a piece of paper next to the characters and suddenly
>they didn't wiggle anymore ...  
> 

You know, there is another illusionary effect that may appear to make
the screen wiggle.  If you eat, grit your teeth or chew gum while you
use your Mac, you will see the screen flicker.  This is because,
stupid as it sounds, your eye is fast enough to compensate for the
screen redraw and avoids the flicker.  Chewing motions throw off the
eye synch and, wah la, redraw flicker appears.  I first noticed this a
couple of years ago.  I went to get a couple of Dutch pretzels and as
I was walking back to my Mac, chewing, I noticed the screen jumping
all over the place (the effect increases with distance from the
screen).  Scared me crapless; "Oh no, not a new analog board!"
However when I stopped chewing, it stopped.  I didn't really know the
cause until a MacWorld Magazine article late last year mentioned this
phenomenon.

Of course, your screen might be jumping, too. 8-)

Jeffrey A. Hallett               (hallett@ge-crd.arpa   hallett@desdemona.uucp)
Software Technology Program
General Electric Corporate Research and Development

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"The needs of the few outweigh the needs of the many"

                                 -- Kirk  (STIII)
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Disclaimer:  My opinions do not represent my employer's, but it is his fault 
             for giving me this thing.

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