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The "haze" is in the eye of the beholder : a diffraction effect caused by the pupil, ( or camera aperture * ).The wikipedia examples below use monochromatic laser light rather than white light so include concentric features which the white street lamps wouldn't have ...https://en.wikipedia.org/wiki/File:Diffraction_on_elliptic_aperture_with_fft.pnghttps://en.wikipedia.org/wiki/File:Laser_Interference.JPG [ * the photo versions can be a starburst with six or eight rays due to the number of blades in the lens variable aperture ]
Very roughly, diffraction is the tendency of light to bend around edges. Cameras have apertures which limit the light coming into them, and eyes have pupils to do the same job. There are a lot of ways to model this, but one particularly simple model is that whenever light hits an obstacle, it tends to scatter primarily in the direction perpendicular to that edge. That's why in the images you posted, as RD mentioned, you can see a bunch of streaks coming radially out of image of the lamp. Even if you had perfect lenses (which you never do), the size/shape of your aperture would place fundamental limits on your image resolution and quality just due to diffraction.
How sure are you that the blur round the lights is not due to scattering?Here's a nice picture of some street lights in fog (so there are lots of scattering centres) and the effect is more pronounced.http://jaumf.deviantart.com/art/Foggy-Lights-74335410