Vision Digest

whiteriver girl asked:


I have a damaged tear duct due to an injury. My vision problem has nothing to do with the injury. I wear the same proscription I did as a child.

TwinkaTee asked:


I posted a question about nystagmus and many people responded that it lead to poor vision. But, there is a person that I see (I don’t know this person) and they are able to run the steps, point out things at a distance and act perfectly normal. So, is this really nystagmus?

hatred_moonfire asked:


My friend gave me a Zen Vision W, but when I plug it in it doesn’t say on the screen that it is connected. It did once, but I didn’t have what I needed installed at the time, so when I restarted it wouldn’t connect again. Any suggestions? I have never been able to figure these out. Shoulda got an iPod.

rlc_60504 asked:


Where can I find more information about parallax in terms of human vision? I know that parallax is used by astronomers to determine distance of far off heavenly bodies from the earth. However, I also know that parallax is used to describe part of the human binocular vision process. I’d like citable sources (books, magazine articles, etc..) that have detailed information on parallax in terms of human vision. Also negative parallax, etc…