At the same time industry was making books of huge dimensions to provide large print, new technology surfaced which would allow manufacturers to enlarge the size of the print without changing the overall dimensions of the book, except for the thickness. This technology, optical character recognition, coupled with word processing, allowed manipulation of all the attributes of print, not just the size of the text. Other attributes which print specialists are able to manipulate are, proportions, leading, spacing, character thickness, character edges, character styles. These attributes could be manipulated either singly, or in combination, to maximize readability of a font. Line spacing and line length are other features of print which can be changed to guarantee good readability.
New technology allows for it all.
The new technology is so good, if one decided to make a font with all the characteristics necessary for maximum readability by users with low vision, one could do it. It's ironic this capability has arrived at a time when large print is viewed by many experts in education and low vision as an unnecessary, even undesirable artifact of past failures. Still, a significant body of research points out the usefulness of large print as a medium for many users with low vision. Users of large print are different from one another in their needs. Given the immense capability to manipulate and enhance print for readability, it is the responsibility of the manufacturer of large print to make the changes necessary to bring large print to a given standard of readability.