Example image of eyePlorer eyePlorer map for 'Darkness': Light Photon Color Thermodynamics Iris (anatomy) Night vision Vertebrate Photoreceptor cell Rhodopsin Bortle Dark-Sky Scale Electromagnetic spectrum Sky brightness Visible spectrum Gamma ray Infrared Gothic fashion Nyctophobia Seasonal affective disorder Benevolence Devi Kali Mother Chinese philosophy Taijitu Rhetorical device King Lear Prince of Darkness A Midsummer Night's Dream Old English Germanic strong verb Dutch language Chiaroscuro Paint Computer monitor Pixel Contrast (vision) Leading line Void Dark tourism Death Suffering Travel Apep Blue hour Forces of Darkness (Power Rangers) Shading Tenebrism Automatic Gun-Laying Turret Charlie Moreno Liver (color)