Hi Rachel @rwinney. I have discovered, at least for me, the increased strain on my eyes is due to my muscle weakness and neuropathy. I had started taking an alpha lipoic acid(ALA) supplement. After a couple of months I stopped taking it when I figured out it was causing my stomach and esophagus burn. Since I stopped I learned that it was the supplement that improved my energy. I believe it is the ALA that helps the body better utilize the glucose for energy. I had noticed an increase in burning pain from my neuropathy, a decrease in energy, and an increase in eye strain. My photobia remained unchanged for now. I just need to figure out how to take the supplement for its benefits without the side effects. I have emailed the manufacturer for advice and waiting for their response. Hope you find this helpful for your health.