Long description of ascii art chart

This chart indicates the percentage of photosensitive patients in whom a photoconvulsive response was elicited by a 2 second train of flashes with eyes open and closed. The chart is constructed with ASCII characters to illustrate the concept of ASCII art.

The vertical axis indicates the percentage (ranging from 0 to 100%) of patients who had a photoconvulsive response. The horizontal axis indicates the flash frequency (ranging from 0 to 70 Hz).

The graph indicates that the greatest sensitivity (eyes open or closed) is at 20 Hz with a steep drop off at higher and lower frequencies, with the data ending at about 5 Hz and 60 Hz.