I doubt the dispersion is caused by any specific properties of my lenses but rather by how my preferred desk arrangement makes me often look off the lens' axes. I could get contacts, but since reading programs is the only time it bothers me, and I otherwise like the rainbows, I just tell all my programs to show normal monochromatic text.
[1] (How strong? Well, the current frames I'm wearing aren't the frames I initially chose; they're the frames I chose out of the set of frames that have the earpieces connected far enough back to allow them to fold closed given the thickness of the lenses I wear. The fact nobody warned me about this when I picked out my first set of frames indicates it likely doesn't happen a whole lot.)