what vision is legally blind

Legal blindness is defined as having a visual acuity of 20/200 or less in the better-seeing eye with the best conventional correction, meaning with regular glasses or contact lenses. This means that even with glasses or contacts, a person can only read the first letter at the top of the Snellen Chart, if that. Another way to qualify as legally blind is to have a visual field of 20 degrees or less in the better-seeing eye, also known as tunnel vision. It is important to note that the term "legally blind" is a definition used by the United States government to determine eligibility for vocational training, rehabilitation, schooling, disability benefits, low vision devices, and tax exemption programs. It is not a functional low vision definition and doesnt tell us very much at all about what a person can and cannot see.