optacon
Noun
Meaning
optacon (plural optacons)
An electromechanical device that selectively raises small rods over the darker parts of a document, and thus enables blind people to read printed material that has not been transcribed into Braille.
Noun
optacon (plural optacons)
An electromechanical device that selectively raises small rods over the darker parts of a document, and thus enables blind people to read printed material that has not been transcribed into Braille.