The dangers of seeing light in the dark.
D003624:Darkness; D006801:Humans; D008954:Models, Biological; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology; D017948:Retinal Rod Photoreceptor Cells / Q000502:physiology; D012243:Rhodopsin / Q000502:physiology*; D014785:Vision, Ocular / Q000502:physiology*
D012243:Rhodopsin