Evolution of human colour vision similar. Tritanopes are missing the short wavelength sensitive opsins and see short wavelength colours in a green hue and dim compared to other colours. They may also see some short wavelength colours as black. Other perception problems include distinguishing yellow from pink or purple colours being perceived as shades of red. Researchers have found that trichromacy has advantages over dichromacy or anomalous trichromacy at further distances. This is believed to occur because visual cues such as shape decrease for colour vision as distance increases for targets of a smaller size. Using tests for spotting fruit pieces in bushes at distances
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.