Audio description refers to an additional narration track for blind and visually impaired consumers of visual media (including television and film, dance, opera, and visual art). It consists of a narrator talking through the presentation, describing what is happening on the screen during the natural pauses in the audio, and sometimes during dialogue if deemed necessary.

For the performing arts (theater, dance, opera), and media (television, movies and DVD), description is a form of audio-visual translation, using the natural pauses in dialogue or between critical sound elements to insert narrative that translates the visual image into a sense form that is accessible to millions of individuals who otherwise lack full access to television and film.

In museums or visual art exhibitions, audio described tours (or universally designed tours that include description or the augmentation of existing recorded programs on audio- or videotape), are used to provide access to visitors who are blind or have low vision. Docents or tour guides can be trained to employ audio description in their presentations. Audio description of sporting events is now becoming more common, in particular at soccer stadiums.

Louis Braille (/ˈbreɪl/; French: [lwi bʁɑj]; 4 January 1809 – 6 January 1852) was the inventor of braille, a system of reading and writing used by people who are blind or visually impaired. As a small child, Braille was blinded in an accident; as a boy he developed a mastery over that blindness; and as a young man – still a student at school – he created a revolutionary form of communication that transcended blindness and transformed the lives of millions. After two centuries, the braille system remains an invaluable tool of learning and communication for the blind, and it has been adapted for languages worldwide.

Braille was born in Coupvray, France, a small town located southeast of Paris. He and his three elder siblings – Monique Catherine Josephine Braille (b.1793), Louis-Simon Braille (b.1795), and Marie Celine Braille (b.1797) – lived with their mother, Monique, and father, Simon-René, on three hectares of land and vineyards in the countryside. Simon-René maintained a successful enterprise as a leatherer and maker of horse tack.

Stephen William Hawking, CH, CBE, FRS, FRSA (born 8 January 1942) is a British theoretical physicist, cosmologist, and author. His key scientific works to date have included providing, with Roger Penrose, theorems regarding gravitational singularities in the framework of general relativity, and the theoretical prediction that black holes should emit radiation, which is today known as Hawking radiation (or sometimes as Bekenstein–Hawking radiation).

He is an Honorary Fellow of the Royal Society of Arts, a lifetime member of the Pontifical Academy of Sciences, and in 2009 was awarded the Presidential Medal of Freedom, the highest civilian award in the United States. Hawking was the Lucasian Professor of Mathematics at the University of Cambridge between 1979 and 2009. Subsequently, he became research director at the university's Centre for Theoretical Cosmology.

Hawking has a motor neurone disease related to amyotrophic lateral sclerosis, a condition that has progressed over the years. He is now almost completely paralysed and communicates through a speech generating device. He has been married twice and has three children. Hawking has achieved success with works of popular science in which he discusses his own theories and cosmology in general; these include A Brief History of Time, which stayed on the British Sunday Times best-sellers list for a record-breaking 237 weeks.

Helen Adams Keller (June 27, 1880 – June 1, 1968) was an American author, political activist, and lecturer. She was the first deafblind person to earn a Bachelor of Arts degree. The story of how Keller's teacher, Anne Sullivan, broke through the isolation imposed by a near complete lack of language, allowing the girl to blossom as she learned to communicate, has become widely known through the dramatic depictions of the play and film The Miracle Worker.

A prolific author, Keller was well-traveled, and was outspoken in her anti-war convictions. A member of the Socialist Party of America and the Industrial Workers of the World, she campaigned for women's suffrage, labor rights, socialism, and other radical left causes. She was inducted into the Alabama Women's Hall of Fame in 1971.

Helen Adams Keller was born on June 27, 1880, in Tuscumbia, Alabama. Her family lived on a homestead, Ivy Green, that Helen's grandfather had built decades earlier. Helen's father, Arthur H. Keller, spent many years as an editor for the Tuscumbia North Alabamian and had served as a captain for the Confederate Army. Helen's paternal grandmother was the second cousin of Robert E. Lee. Helen's mother, Kate Adams, was the daughter of Charles Adams. Though originally from Massachusetts, Charles Adams also fought for the Confederate Army during the American Civil War, earning the rank of brigadier-general.

Johanna "Anne" Mansfield Sullivan Macy (1866–1936), also known as Anne Sullivan, was an American teacher best known as the instructor and companion of Helen Keller.

Sullivan was born on April 14, 1866 in Feeding Hills, Massachusetts. According to her baptismal certificate, her full name at birth was Johanna Mansfield Sullivan; however, she was called Anne from the time she was born. Her parents' names were Thomas Sullivan and Alice Cloesy Sullivan and they were Irish immigrants who couldn't read and had little money. In 1874 her mother, Alice, died, probably of tuberculosis; after which Anne was sent to an almshouse, that today is Tewksbury Hospital in Tewksbury, Massachusetts. She was at Tewksbury for four years. In 1880, Anne, who was blind from untreated trachoma, was sent to the Perkins School for the Blind. Anne had a brother, Jimmie (James), born in 1869, a sister Ellen born in 1867 and a sister, Mary.^{[citation needed]}

Michael Anagnos, director of the Institute, then located in South Boston, was approached to suggest a teacher for the Keller's deafblind daughter. He asked Anne Sullivan, a former student, herself visually impaired and only 20 years old, to become Helen's instructor. It was the beginning of a 49-year relationship, Sullivan evolving into governess and then eventual companion.