The human eye is a simple, but extremely robust, optical instrument. Analysis by sophisticated wavefront-sensing technology and customized ray-tracing has now revealed that the eye is actually an ...

Inside the human eye, the retina is made up of several types of cells, including the light-sensing photoreceptors that ...

The 'nifty fifty' (or 50mm prime) is a perfect example of a standard focal length that's used to shoot a wide range of subjects, as it's close to human vision, making it popular for casual ...