Many children who have low vision or are blind (see Blindness) learn to read and write by using the Braille system of raised dots that can be read by touch rather than sight. They may also use a special laptop computer that allows them to take notes in Braille and print in Braille or English. Sophisticated electronic devices can also convert print into a form that is readable by blind or visually impaired students. Some computers can scan printed text for a blind student and read it aloud by means of a synthetic voice. Most children with visual impairments have some functional vision and can often read by using large-print materials. See also Education of Students with Vision Impairments.