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    Looking at the Sun
    From: Frank Reed
    Date: 2009 Jun 19, 21:10 -0700

    I figured I would start a new thread with this topic. For anyone who didn't 
    catch them, there are a number of messages in the thread on "computing 
    sunrise/sunset" which deal with the question of damage to the eyes from 
    looking at the Sun particularly through a sextant telescope or binoculars. 
    This has been a popular topic in the past on NavList. Try searching the 
    NavList archives for the word "retina". Here's a link to that search:
    Here's an external link that fits well with my understanding of the issue, at 
    least with respect to eclipses:
    Just as a general un-scientific survey, how many of you have caught a quick 
    glimpse of the Sun through a sextant telescope? How long did it take for the 
    spots to go away. I have done so on several occasions, and while a spot in my 
    vision once lasted for more than a minute, it's never been worse than that. 
    Of course, these are quick glimpses of the Sun which immediately triggered my 
    reflex to look away.
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