What are moon letters?

Moon letters refer to a set of symbols used in the Moon Type, a tactile writing system developed for visually impaired individuals. Created by William Moon in the 19th century, these letters are designed to be easily felt, with rounded shapes and distinct features that allow for quick recognition. Moon letters are an alternative to Braille and serve to enhance literacy among those with visual impairments. The system is less commonly used today but remains part of the history of accessible communication.