1. completely blind means people cannot see at all, or you may see a few? Unable to use, or not use the eyes to be useful in the course or activity. Must use the senses? Other than to learn.
1. blindness means that people can not see it. Or may see some more. Can not take your eyes Or no sight to be useful in teaching or doing activities. To use senses Instead of learning
1.Completely blind. I mean, people who can't see. Or they may see some not much, cannot use the sight, or without the use of sight to be useful in learning or doing activities. To use of the senses.