Madhav Pathak has changed the conventional Braille slate, making writing easier for the visually impaired. After Madhav Pathak found that his uncle could not easily write in Braille, the system of six raised dots, he decided to change it. Braille has a steep learning curve: Blind children have to memorise more than 300 combinations of dots, since they need one set of combinations for reading, and another set for writing! Madhav has modified the Braille slate (used for writing the language), which lets students easily read and write the language. For this, he has 12509 Pathak named after him.