Thanks for your reply. My question was more geared toward the braille books that we are receiving from other agencies. Our student has continually had trouble reading the grids in the math books. These are grids that are produced on thermoform machines. They come from a variety of agencies. When I produce grids for the student, I am aware of the issue and make sure the grid lines are more readable.
I was inquiring to see if anyone else who works with braille-readers was having the same issues.