Sentence:  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 <WSD>cameras</WSD> mimic this arrangement. 
Meaning of the word marked with <WSD> tags:  A device for taking still or moving pictures or (photographs).