Actually try this: take welder googles (not mask), remove the lenses and replace them with stacked sheets of red and blue light filter (Rosco was the brand I used). This will block almost all visible light but let near-infrared come through. Wear these glasses in bright daylight, just never ever stare at the sun, really just don't. However, the result is, that you will see in the near-IR spectrum. Your rods/cones are not very sensible to this frequencies, so it must be a bright sunny day, but it works.
Just don't look at the sun directly, while your pupils are completely open, you would burn your retina pretty quickly.