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I recently took part in a light therapy trial at QUT Institute of Health and Biomedical Innovation in Brisbane, Australia. It is researching Photoreceptor- directed light therapy in PD.
Their “research has shown that there are specific cells (Mel’s ops in cells” in the back of the eye that are not working well in people with Parkinson’s disease. These cells function can be simply determined by measuring your pupil movements in response to light.” This clinical trial is using a light they developed to preferentially activate these cells.
They believe that by using this light 30 minutes a day to preferentially activate Mel’s ops in cells in the eye will help to sleep better which will positively impact on movements such as balance, gait and tremor during the day.The trial is still ongoing and won’t have results for another 12 months. I did not feel any different but perhaps I was one of the control group.