Night Vision Camera for Nintendo Switch allows you to use the Right/Red joycon's IR Sensor to actually see things in the dark.
The night vision allows you to see for about .5 meters away from you. its fully black and white/ Green and black so its not very clear.
Night Vision is out now on the eshop for $10 and allows you to capture photos in black and white with your Joycons.
This is surprisingly not homebrew.