Single may refer to:
Single (music), a song release
"Single" (Natasha Bedingfield song)
"Single" (New Kids on the Block and Ne-Yo song)
Single (baseball), the most common type of base hit
Single (cricket), point in cricket
Single (football), Canadian football point
The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution, resolving incoming images in minute detail. It’s therefore not surprising that most cameras mimic this arrangement.