She also has a history of OCD issues -- a need to be perfect on details that don't matter in the scheme of things. Any thoughts?
Your daughter's difficulty with brightly lit areas may be an indication that she's sensitive not to the light itself, but to how it reflects off the page. While somewhat controversial, there is a condition known as scotopic sensitivity syndrome, which attempts to describe this difficulty. Some students find it helpful to put a sheet of soft-colored acetate (plastic you can get at an art store) over the page. They say it cuts down the glare and helps the letters stand out more. You might want to contact an experienced developmental optometrist who can look into the eye tracking issue and the light sensitivity. Find someone who has a proven track record working with students with reading problems of this nature. Have the optometrist compare his findings with those of the neuropsychologist before you decide on any intervention.