The highest frequency of occurrence of epicanthic folds is found in specific ethnicities: East Asians, Southeast Asians, Central Asians, North Asians, Polynesians, Micronesians, Native Americans, Mestizos, the Khoisan, and the Malagasy.
Among South Asians, they occur at very high frequencies among the Bhutanese, Northeast Indians, Kirati, and certain Adivasi tribes of eastern India.

In some of these populations the trait is almost universal, specifically in East Asians and Southeast Asians, where a majority, up to 90% in some estimations, of adults have this feature.
The highest frequency of occurrence of epicanthic folds is found in specific ethnicities: East Asians, Southeast Asians, Central Asians, North Asians, Polynesians, Micronesians, Native Americans, Mestizos, the Khoisan, and the Malagasy. Among South Asians, they occur at very high frequencies among the Bhutanese, Northeast Indians, Kirati, and certain Adivasi tribes of eastern India.
In some of these populations the trait is almost universal, specifically in East Asians and Southeast Asians, where a majority, up to 90% in some estimations, of adults have this feature.
Epicanthic fold