What is the correct distance at which you should red a book?

October 11, 2008 4:00am CST
I wear glassses for reading but Ifind that if Ikeep the book at a greater distance, I can read clearly without glasses. Is it ok to read ike this? Will it lead to further deterioration of my eye sight if I read from a distance without glasses even if it is not straining my eyes? At what distance should one normally keep a book while reading?