Jul 20, 2018 · People with red eyes do not actually have red irises. Most people's blood vessels are obscured by the pigment in their irises, but for people lacking melanin in their irises due to albinism, the blood vessels are visible enough to create a pink or red appearance.

Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.

Although red/violet and heterochromic eyes are extremely rare (seen in less than 1% of the population), it's hard to quantify precisely which eye color is the rarest. Still, if you have never seen any of the ones listed below, it's because they're not common.

Mar 5, 2025 · Red, pink, or violet eyes occur in 0.01% of the global population due to albinism. Green eyes occur in 2% of people and are the rarest naturally occurring eye color. Gray eyes occur in about 3% of people because of a lack of melanin in the iris.

True red irises are visually striking yet extremely rare. They originate from either melanin deficiency or unique genetic variants inhibiting melanin synthesis. Predominantly found among albinism patients and select ethnic groups, red eye colour stands at the top of the rarity scale.

Nov 19, 2024 · Why Do Albino Eyes Appear Red or Pale? The distinctive appearance of albino eyes—whether red, pink, or pale blue—is directly tied to the absence or reduction of melanin in the iris and other parts of the eye.

Feb 15, 2024 · Yes, it is possible for humans to have red eye color, although it is extremely rare. The presence of red eyes usually occurs due to the lack of melanin in the iris, which can be a result of a medical condition or genetic trait. Eye color is determined by the amount and type of pigments in the iris, the colored part of the eye.

4 days ago · The iris doesn't actually have red, pink, or violet pigment, though. These colors result from blood vessels at the back of the eye being visible. In other people, the color of the iris blocks the view of these blood vessels.

Sep 10, 2017 · Two major conditions cause a red or pinkish eye color: albinism and blood leaking into the iris. Although albinos tend to have very, very light blue eyes due to a lack of pigment, some forms of albinism can cause eyes to appear red or pink.

Sep 7, 2024 · Red Eyes: Present mostly in individuals with albinism, red eyes result from a complete lack of melanin, which allows the blood vessels in the iris to show through. It's the rarest of eye colors and can range from a light pink to a deep red.