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So I heard back from Prof. Arnold Wilkins at the University of Essex and this is what he had to say about his research into the glasses. Thank you for your letter, which I was very pleased to receive. I now have two out of two patients whose cluster headaches have remitted with precision tints. The tints were both provided by the Intuitive Colorimeter, but they were not the same. The second patient’s tints did not absorb short wavelength light. This leads me to suppose that the critical feature is that the tint increases visual comfort, and that the Colorimeter is a good way of selecting the tint. I would be extremely interested in setting up a trial, perhaps in collaboration with your organisation and a medical advisor. The Intuitive Colorimeter is widely available among optometrists in the UK but there are few individuals with the machine in the USA. I am currently getting together a list of US practitioners who have the machine and might be interested in being involved in a study. A few points about funding such a study. The firm that make the Colorimeter and tints have offered 10 free pairs of the lenses in the first instance. So far, practitioners have offered their time for the assessment without charge, but it would be nice to avoid taking advantage of their goodwill. As I am sure your will be aware, 2/2 patients without cluster is a good ratio. I have hope that we just might have stumbled upon a really useful non-invasive treatment. I will write again when I have a list of US practitioners. In the meantime, if any of your members live near Ottawa and wish to try precision tints then I would recommend that they get in touch with Karen Monet of Opticalm (https://www.opticalm.ca/) Best wishes Arnold Arnold Wilkins Emeritus Professor University of Essex UK

I don't think it helps CH. I have an actual screen cover that filters out nearly all blue light on my computer (which I am on 7 to 8 hrs. a day) and it's never helped... I think it's a migraine thing as many with migraine are sensitive to light...

I seem to be doing better across the board. All sx better or gone.

I work with computers everyday at work. I've reduced the blue light on my screen and it hasn't help one bit .So from my experience blue light reduction doesn't help CH , but I could be wrong

I would think polarized glasses would sort of work like blue light reduction which you can put on most cell phones and can purchase for computer screens.. I have heard this helps for migraine don't know about CH...