They therefore have fewer problems than those who are blind. Those who are legally blind, on the other hand, can at best see light and unclear out-lines. At worst, they can see nothing at all. They are therefore unable to read standard writing, and instead must use Braille.
弱視也就是「低視力」，他們在輔助眼鏡、放大鏡等輔助工具的協助下，可以看得見，因而可以閱讀一般文字，問題較小；至於盲，則有的可以看見一些光影和模糊的輪廓，有的完全看不見，閱讀書寫時無法使用一般文字，必需以點字代替。