Those people who have a lot of usable vision may be able to read magnified print.
Magnification is any alternative technique which presents a larger image to the eye.
Anytime reading is needed. Depending on how the magnification is done, it can be used anywhere reading is done. There are several different magnification alternative techniques discussed. Computer software can increase the font size on the screen. Many visually impaired people only need to magnify text in order to read.