Night blindness is a common issue for people with low vision, especially those with Retinitis Pigmentosa. While your vision may be adequate for mobility in daylight, as the night draws in and contrast begins to drop, night blindness occurs. 
When i had sufficient vision for this to be a problem for me, I was always tempted by night vision goggles. There have even been research projects exploring this possibility. The good news is it can really help with mobility, the bad news night vision goggles are expensive, cumbersome and heavy.
Due to these restrictions i never quite took the plunge. But an interesting development once again has me intrigued in night vision. Thanks to a new breakthrough the advantages of night vision goggles can be had in a spectacle frame. There is still a need for external power, but great to see this moving forwards.
As augmented reality products advance it would be great to see this technology integrated to enable low light navigation.

Night vision goggles