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From: geb@cadre.dsl.PITTSBURGH.EDU (Gordon E. Banks)
Newsgroups: comp.sys.mac
Subject: Re: Screens hurt eyes
Message-ID: <773@cadre.dsl.PITTSBURGH.EDU>
Date: Sat, 8-Aug-87 08:50:42 EDT
Article-I.D.: cadre.773
Posted: Sat Aug  8 08:50:42 1987
Date-Received: Sun, 9-Aug-87 11:13:41 EDT
References: <1767@batcomputer.tn.cornell.edu> <993@ski.UUCP> <1924@batcomputer.tn.cornell.edu>
Reply-To: geb@cadre.dsl.pittsburgh.edu.UUCP (Gordon E. Banks)
Organization: Decision Systems Lab., Univ. of Pittsburgh, PA.
Lines: 27
Keywords: screens, screen, hurt, eyes, Clinton Taiwan Corp.

In article <1924@batcomputer.tn.cornell.edu> dyckman@tcgould.tn.cornell.edu (Howard L. Dyckman) writes:
>Eyes hurt much worse than what Dr. Robins describes.
>
>In article <993@ski.UUCP> dr@unix.UUCP (David Robins) writes:
>>>>In article <1767@batcomputer.tn.cornell.edu>, dyckman@batcomputer.tn.cornell.edu (Howard L. Dyckman) writes:
>
>My eyes have been sore, dry, and sensitive for four months, not 1-2 days.
>They are recovering slowly.  At one time, my eyes were so dry that mild
>breezes bothered them, making it very uncomfortable to take a walk
>outdoors.  These and other symptoms were caused by some recent Macintosh
>computer screens (SE, Plus).  They have a harsh feeling to my eyes
>which often becomes apparent after brief use.  Prior to this
>experience, other exposures produced symptoms which lasted for days.
>
>I am an experienced Mac user; older Mac screens have never hurt my eyes.
>
Your confidence in your own epistemology is amazing!  To say it is
CAUSED implies that you know what the mechanism is.  Otherwise, it
could simply be that whatever is wrong with your eyes causes you
to be unable to look for a few minutes at a bright mac screen.
Have you been using old macs recently (since your eyes were
bothering you)?  As far as I know, the CRT is identical in the
mac 512 and the mac+.  It would be interesting to do a double blind
study, with the mac covered except for the screen to see if the
symptom can be reliably reproduced only with the mac+ or SE.  Whatever
the real cause, you need to see an ophthalmologist to make sure you
don't have Sjogren's syndrome or iritis or something.