There are several ways to define blindness. Many people regard blindness as the inability to see at all or, at best, to discern light from darkness. The National Federation of the Blind takes a much broader view. We encourage people to consider themselves as blind if their sight is bad enough—even with corrective lenses—that they must use alternative methods to engage in any activity that people with normal vision would do using their eyes.
The United States Bureau of the Census question about “significant vision loss” encompasses both total or near-total blindness and “trouble seeing, even when wearing [...]
4 stars; 86.6% of tests passed. [Note: this rating is a work in progress.]
|Level A||Level AA||Level AAA||Unique|
Error data courtesy of Tenon.io