Evolution of human colour vision that are found between 450 and 625. Individuals with various forms of colour blindness such as deuteranopia and protanopia are missing human middle wavelength sensitive or long wavelength sensitive opsins. Their minimum wavelength differences are <5 but only at around 500. Protanopes, who are missing long wavelength sensitive cones, are unable to distinguish between colours in the green-yellow-red section of the electromagnetic spectrum. They find yellow, red and orange colours to have much lower brightness when compared to a trichromat. The dimming of these colours can result in confusion in many cases, such as when attempting to identify red traffic
Eye to Eye (Taher Shah song) where he sings about "sensational eyes, emotional eyes, colourful eyes, exciting eyes, fabulous eyes, spectrum eyes, human eyes, my eyes, your eyes...". The music video, which gained notoriety for its absurd and nonsensical English lyrics, shows Taher Shah swaying side to side to the song while singing and blinking coyly at the screen. A duplicate of Shah, dressed in black with sleek hair, is also seen in the video singing and swaying alongside the white-clad Shah. At one point in the video, the two give a short message: "Eye to eye, makes a peculiar love, lifetime, once in a life.