Through the eyes of others

Through the eyes of different animals, the world does not look the same. How we perceive the world around us, is a consequence of the physiology of our eyes. Many birds can see a greater number of colors than humans do and can also see the ultraviolet light that is...

Colours in the dark

After the sun has set and darkness falls, our eyes can no longer see in color. The reason for this is that the cells responsible for color vision, the cones, need a certain amount of light to function. In our eyes, and in the eyes of other vertebrates, there are...