"My, what amazing eyes you have! Owls are famous for their vision. With their ability to spot and capture tiny prey even on the darkest nights, it's no wonder that we're curious how they do it. Well, for starters, they don't have round eyeballs like us. Instead, they're elongated and held in place by "sclerotic rings," a bony structure in the skull. Owls do have binocular vision similar to humans, since they eyes are forward-facing, giving them (and us) a great ability to judge height, weight and distance. However while humans have a 180-degree field of view with about 140 degrees of it being binocular, owls only have a 110-degree field of view with about 70 degrees of binocular vision. What they lack in binocular vision they make up for in their legendary night vision and farsightedness.   Owls.org writes, "The tubular shape also gives a comparatively large retina size that is packed full of light sensitive rods... The phenomenal light gathering properties of the owl's eye is further enhanced in many species by a reflective layer behind the retina, called the tapetum lucidum, which reflects back onto the rods any light that may have passed through the retina without hitting one the first time. Tawny owls would appear to have the best developed eyes of all the owls, indeed of all vertebrates, being probably about 100 times more sensitive at low-light levels than our own."   Another cool thing about owl eyes is the iris color. The iris color is somewhat related to the time of day or night in which an owl hunts. PawNation reports, "Although not accurate with every owl species, eye color tends to indicate what time of day the owls prefer to be active. There are always exceptions, but most owls hunt around the same time as other owls with the same color eyes, according to Raptor Rescue, a bird-of-prey rehabilitation charity. The link is not fully understood but it's pretty reliable: Species eye color correlates to daily activity periods."   The colors tend to be dark brown or black for strictly nocturnal owls, orange (and almost red as pictured in the owl above) for crepuscular owls that hunt around dawn and dusk, and yellow for diurnal owls who hunt during the day." - Son of Groucho