Treatment of Cluster Headache in a Different Light: A Case Study

We report on a patient with cluster headache who wore spectacles tinted to provide maximum comfort when reading printed text. The spectacles absorbed short-wavelength light and were only worn during the prodrome period. The patient has been free of cluster headaches for the 6 years since the spectacles became available, and the prodromes have decreased in severity and frequency. The hypothalamus is highly active during cluster headaches and receives visual input from the intrinsically photosensitive retinal ganglion cells (ipRGCs). The ipRGCs are most sensitive to short-wavelength light.