https://github.com/denispelli/Eye-Chart-Fonts https://github.com/denispelli/Eye-Chart-Fonts says "The Sloan font file was created by Denis Pelli based on Louise

https://github.com/denispelli/Eye-Chart-Fonts https://github.com/denispelli/Eye-Chart-Fonts says "The Sloan font file was created by Denis Pelli based on Louise Sloan’s specifications and used for the Pelli-Robson contrast sensitivity chart (Pelli, Robson, & Wilkins, 1988). Louise Sloan’s design has been designated the US standard for acuity testing by the National Academy of Sciences, National Research Council, Committee on Vision (NAS-NRC, 1980)."