Heterochromia is the term provided to describe a difference in a person’s eye color. Who with central heterochromia has different colors within the same eye. Finish heterochromia is when they have two different colored eyes.

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Heterochromia the the eye is brought about by variations in the concentration and distribution the melanin, the pigment the gives color to the skin, hair, and also eyes.

The indigenous “heterochromia” is acquired from ancient Greek wherein “heteros” means different and also “chroma” way color. The condition is likewise known together heterochromia iridis or heterochromia iridum.

Share ~ above PinterestCentral heterochromia describes a mix of colors in one eye, and also occurs as result of uneven circulation of melanin.
Eye color is a an outcome of melanin store in the iris, which is the component of the eye responsible for dilating and also constricting the pupil to control the quantity of light the enters. Blue eyes have tiny amounts the melanin while brown eyes space rich in melanin.

Iris shade may no stay consistent throughout a who life. Because that example, countless babies space born with blue eyes the darken within the first 3 year of life. This adjust occurs as melanin develops.

Uneven distribution of melanin leads to main heterochromia and other varieties of heterochromia.


Most cases of heterochromia are existing from birth once the problem is referred to as genetic heterochromia.

Research argues that most cases of heterochromia in humans are benign and also occur without any kind of underlying abnormality.

According to the Genetic and also Rare diseases Information Center, most situations of heterochromia the the eye happen sporadically in human being with no family history of the condition.

However, some situations of genetic heterochromia are attached to diseases and also syndromes, including:

Bloch-Sulzberger syndromeBourneville diseaseHirschsprung diseaseHorner’s syndromeParry-Romberg syndromeSturge-Weber syndromevon Recklinghausen diseaseWaardenburg syndrome

Heterochromia that develops later in life because of illness, injury, or medication, is well-known as obtained heterochromia. This is less usual than the genetic form.

Share on PinterestDiabetes can lead to gained heterochromia.

Causes of obtained heterochromia include:

eye surgeryinjury to the eyeiris ectropion syndromepigment dispersion syndromePosner-Schlossman syndromeswelling the the eyetumors of the iris

In addition, a medication called latanoprost, which is offered to act glaucoma, has been connected with transforms in eye color in up to 33 percent that those acquisition it for 5 year or longer. Latisse, i beg your pardon is a drug once supplied to law glaucoma yet now generally used come thicken eyelashes, may additionally account because that a adjust in eye color.

Types the eye heterochromia

The different types of heterochromia that the eye include:

Central heterochromia

Central heterochromia is defined by having actually two various colors in the same iris. Usually, the outer ring that the iris is one color while the inner ring is another.

The inside ring regularly seems to have actually “spikes” of various colors that radiate from the pupil or the black color circle at the facility of the iris. Eye that have this pattern might be described as “cat eyes.” The outer shade is considered to it is in the true iris shade in world with main heterochromia.

Central heterochromia has tendency to occur in irises that have low level of melanin.

Complete heterochromia

People with this condition have 2 different-colored eyes. Because that example, castle may have actually one blue eye and one brown eye.

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Sectoral heterochromia

In civilization with sectoral heterochromia, likewise known together partial heterochromia, one part of the iris is a different color from the rest. Sectoral heterochromia often resembles one irregular clues on the iris of the eye and does not kind a ring approximately the pupil.