Who cannot use this device:
Anyone with any condition that causes sensitivity to light e.g. Lupus erythematosus, photosensitive eczema or Albinism
Anyone taking medication that can cause light sensitivity - includes certain antibiotics, chemotherapy drugs, and diuretics.
If you are unsure about any medication consult your healthcare provider
Anyone with genetic eye condition
Other substances can cause light sensitivity: St John’s Wort, Coal tar, deodorants, antibacterial soaps, artificial sweeteners, naphthalene (moth- balls), petroleum products, brightening agents found in laundry detergent, and cadmium sulphide (a chemical injected into the skin during tattooing).