What color eyes do cats have at night? - briefly
At night, cats' eyes typically appear to glow in shades of green, yellow, or blue due to the reflection of light by the tapetum lucidum.
What color eyes do cats have at night? - in detail
Cats' eyes at night often appear to glow in a range of colors, primarily due to a layer of tissue called the tapetum lucidum located behind the retina. This reflective layer enhances their night vision by bouncing light back through the retina, allowing them to see more effectively in low-light conditions. The specific color of the glow can vary depending on factors such as the cat's breed, age, and individual genetics. Common colors observed include green, yellow, and blue, though variations like orange or red can also occur. Green is the most frequently seen color, resulting from the tapetum lucidum reflecting light in a way that emphasizes this hue. Yellow is also prevalent, particularly in cats with a high concentration of riboflavin in their tapetum. Blue is less common but can appear in certain breeds or younger cats, while red or orange glows are rare and typically linked to the absence of a tapetum lucidum, causing light to reflect directly off the blood vessels in the retina. The intensity and shade of the glow can also be influenced by the angle and type of light source, such as a flashlight or car headlights. This phenomenon not only aids cats in navigating dark environments but also contributes to their mystique and the fascination humans have with their nocturnal behavior.