Sadly not, we are all unique individuals; we might block a certain colour for one person, whilst the same colour may help another will dyslexia. There is no test whether someone will benefit from FL-41, just like back in the 90s, it’s trying it and see. On a positive note, Birmingham University assembled over 500 migraine sufferers and over 80% benefited. It’s got to be worth a try, start with the tester. If you wear prescription lenses the tester will fit over normal size spectacles. Your only loss, if they don’t work for you, is the return postage; as soon as the glasses are returned you will receive a full refund.
The natural tendency for a migraine attack is to head for the nearest dark room. This will help, of course, you are removing all light and colour. But that’s just treating the symptom and not the cause. Another common practice is to wear very dark glasses, this has the same effect. The graph below shows the difference between a pair of dark grey lenses in the red line against the FL-41 filter is the blue. You can clearly see the dramatic difference in the mid frequency.