Maybe it's just that astronomer are more observant of changes in their eyes due to the fact that they give them extensive use when viewing?
I know I have noticed my vision changing in the last few years and friends who arn't astronomers haven't complained like I have either.
I was really suprised to see the brilliant light blue in the ghost through Andrew's scope at IISAC last Saturday night, Andrew was a wealth of info on astronomy on the night sky and a very nice person as was everyone I met at the camp.
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