wyle@inf.ethz.ch (Mitchell Wyle) (07/03/89)
In article <783@lakesys.UUCP> davef@lakesys.UUCP (Dave Fenske) writes: >I don't believe there is any radiation (as in X-rays) to worry about. There >are many other factors that have not been proven to either have or not have >effect on human beings. There is some speculation that Radon might be attracted to a VDU screen (or TV) because of the magnetic field. If you work in a well-isolated stone building with closed windows, you might want to measure the radon in the room and how much congregates around the screen. I've seen no EPA data about radon and VDUs. VDUs do not emit any harmful radiation. I've seen lots of studies, controls, regulations, etc. in "Health Physics Journal." Some people complain of eye strain and astigmatism after n years of VDU exposure (8 hours a day). A simple "exercise" prescribed by a physical therapist / karate master is: Three times a day, spend 2-3 minutes focusing first on something very close (your hand) and then something very far (out the window). Wait til your eyes focus, then dart to the other object. He claimed that flexing the lenses in your eyes would postpone lens hardening in later life (and the need for bi-focals). -- -Mitchell F. Wyle Institut fuer Informationssysteme wyle@inf.ethz.ch ETH Zentrum / 8092 Zurich, Switzerland +41 1 256 5237
davef@lakesys.UUCP (Dave Fenske) (07/04/89)
The eye exercise mentioned is also included in The Cambridge Vision Institute's
vision training program. In that regard, I have two things additional to say:
1) The exercise does work.
2) Yes, I did get the program because of eye strain from these dang
contraptions.
DFdar@telesoft.UUCP (David Reisner) (07/06/89)
A couple of years ago, I became unhappy with my adaptation from close to far focusing. I started doing focusing exercises of the type being discussed (I thought of this myself). I like to do it on the freeway - looking from dash board to close signs to far signs. At my most recent eye exam, my vision was measured as between 20/10 and 20/15 (corrected, and apparently unusual) and my astigmatism has reduced by 25% (to 3/4 diopter). I don't know if there is any relationship. -David ucsd!telesoft!dar, dar@sdcsvax.ucsd.edu