When I'm sitting out on my deck at night reading an iBook or browsing with Safari, I would really like a "Night Vision" mode. In the app Star Walk you can enter a night vision mode which turns all whites to red. It would really help keep away bugs and be easier on my eyes if the iPad had this ability everywhere. Barring that, at least in iBooks so I can read outside at night.
I'd read somewhere in the forum that ibooks on ipad - you can change the setting to have white letters on a black background. I'm still waiting on my ipad, but on my ipod touch I have not been able to find a setting to do this in either the ibooks app or in the ipod settings. I did find another book app called Stanza where you can switch easily between black fonts on a white background or white fonts on a black background. I have found that it is much easier to read white letters on a black background in low light level situations.
Not sure about Safari - I typically just turn the screen brightness down as far as I can ( I know it's still bright in complete darkness)
Settings--> Accessibility--> White on Black--> On... This might or might not work for you. Try it when reading books.
Or
Open a book in in the iBook app... Click on the font icon, upper right. You can pick sepia (light brown) for the color of the paper. This may make it a little easier to read a book.
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