Night vision eye-drops that could allow us to see normally invisible infrared light have been developed, with a team of researchers figuring out a way to give mammals superhero-style eyesight. The groundbreaking research initially focused on testing with mice, but the same principles should in theory work with all mammals.
Human vision covers only a relatively small portion of the electromagnetic spectrum. While our eyes can handle wavelengths roughly as low as 400 nanometers, and as high as around 700 nanometers, that still leaves whole swathes of spectrum that is lost to our sight.