There is very little literature on this topic and every optometrist (and I suspect optician) who encounters these patients has an opinion (sometimes a strong one) on this issue. FL-41 lenses have some (limited) mention in the headache literature. For those who are inclined to include tint in lenses for post-brain injury patients - how do you determine the tint and the density of tint for the lenses? Is there any science behind your practice on this?

(By the way, if there is no science in selection you are in the majority so no judgement.)