Lost Your Night Vision After Lasik? This May Be Why
From Ted Twietmeyer
Ever play ball outside near sundown, and see the ball keep appearing and disappearing while in the air? Vision scientists call this "photon starvation." This is the brief period of time when it is becoming too dark for your normal daytime cone photo-receptors to work properly, but not yet dark enough for rod photo-receptors to takeover. At night with dim light you always see everything in black and white, not color. Some things can still appear in color if bright enough, such as a bright mercury-vapor streetlight which appears blue-white. Or a high pressure sodium streetlight will appear orange.
Field engineers for one large Lasik company quietly went to all their Lasik machine sites and replaced the 400nm UV treatment laser with a 200nm treatment laser.