Direct social services would be a good option. Group homes for people with disabilities or severe mental illness are almost looking for people to cover shifts throughout the day and weekends. Pay isn't the best, but better than minimum wage. Very little computer work.
If this turns out to be a permanent issue, social work would be a good option but it might require additional schooling or credentialing. There is usually a bit of computer work, mostly entering cases notes, but the kinds of employers that need social workers (state, county, and local governments, social service organizations) are more likely to be accommodating of the kinds of needs she has.
On a side note, please encourage her to continue to work with her doctor to figure out why this is happening. I had a similar problem to her a year or so ago where I suddenly could not look at computer screens for long and was getting daily headaches. I went to several doctors and was mostly brushed off as being unreasonable. After many months of that, I figured out the issue was that my eye doctor had given me a contacts prescription that was ever so slightly wrong. Once that was fixed I was back to normal. Sometimes doctors can be very dismissive of young women's health concerns so I would hate if she felt like this was something she just needed to deal with.