Scotopic vision is also colloquially referred to as night vision. This type of vision is performed with the rods in the eye. As these are mainly located in the peripheral areas of the retina, visual acuity is low. In contrast to cone-based vision during the day, no colours are perceived. When seeing at night, we only recognise differences in brightness. However, this means we are very sensitive to movements in the peripheral field of vision. Twilight vision (mesopic vision) lies between night vision and day vision.