Another benefit of going into this line of work is that blind people don't have to face having doors slammed in their faces again and again by prospective employers. Instead, they can work independently or open a clinic with a few friends. It really is the path of least resistance for visually-impaired persons trying to make a living.
最大的好處是可以獨立作業，也可以三五好友共同開店經營，不會面臨找工作處處碰壁的難堪，的確是視障者謀生的「方便之門」。