Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site ttrdc.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!ihnp4!mgnetp!ltuxa!ttrdc!levy
From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: net.med,net.info-terms
Subject: Re: VDT's and eyes.
Message-ID: <642@ttrdc.UUCP>
Date: Sat, 14-Dec-85 16:52:53 EST
Article-I.D.: ttrdc.642
Posted: Sat Dec 14 16:52:53 1985
Date-Received: Sun, 15-Dec-85 06:56:54 EST
References: <341@weitek.UUCP>
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 25
Keywords: race lights
Xref: watmath net.med:2975 net.info-terms:745

In article <341@weitek.UUCP>, mmm@weitek.UUCP (Mark Thorson) writes:
>Here's an interesting phenomenon.  Run your finger along the line of dots
>from left to right.  Do it slowly, so that it takes about two seconds for your
>finger to cross the screen.  Track your fingertip with your eyes.  You should
>be able to see a "race lights" effect, where you see the dots moving.
>.............................................................................
>After a few times, you will be able to track the moving dots without the aid
>of your finger.  The interesting part is the difficulty in making the dots
>go from right to left.  I can see the dots move that direction when I use my
>finger, but not otherwise.  I suppose this is due to developing left-to-right
>eye muscle coordination for reading.
>Mark Thorson  (...!cae780!weitek!mmm)
>PS No flames from folks on printing terminals, please.

Gee whiz, I can't even notice it at all.  The dots blur a bit while following
with my eyes, but don't move at all.  Could color of terminal screen have
an effect?  (I am using a light amber screen; I can't stand staring at green
screens.)
-- 
 -------------------------------    Disclaimer:  The views contained herein are
|       dan levy | yvel nad      |  my own and are not at all those of my em-
|         an engihacker @        |  ployer or the administrator of any computer
| at&t computer systems division |  upon which I may hack.
|        skokie, illinois        |
 --------------------------------   Path: ..!ihnp4!ttrdc!levy