Braille pattern dots 1-2-4-6-7

Five of the cell’s eight positions contain dots. Viewed from the reading side, the left column is numbered 1, 2, 3, 7 from top to bottom; the right is 4, 5, 6, 8. In ⡫, positions 3, 5 and 8 are empty. “Eight-dot” describes the available positions, not the number filled.

Unicode identifies this arrangement; the Braille code being used supplies its reading. You cannot translate this isolated character reliably without knowing that code. On an ordinary screen, it is a visual text character, not raised dots you can feel.

Why does this pattern have a fourth row?

Eight-dot Braille extends the familiar six-dot cell. The additional bottom positions are 7 and 8; this pattern uses position 7. They allow more combinations, useful for representing computer text.

Braille is a system of reading and writing through touch. Louis Braille encountered Charles Barbier’s twelve-dot military writing system in 1821 and subsequently developed a six-dot system that fitted under a fingertip. Braille also has language-specific contractions—short forms for words or letter groups—and codes for music and mathematics.