Credence is an add-on to LimeWire designed to help users filter out poor quality or corrupt P2P files.
As all of the light from the room enters the glasses, special lenses filter out all frequencies of light, but allow only infrared light to come through.
According to several sources, yellow-tinted lenses do not filter out enough light to be effective against headlight glare.
In addition, if the patient has a high white blood cell count, electronic counting may yield an unusually low platelet count because white blood cells may filter out some of the platelets before the sample is counted.
Busier schedules also mean that people want to know more about each other before they invest the time and energy of an actual "date," and online flirting can help filter out the obvious mismatches.