Original sentence: All so-called "albino" horses have pigmented eyes, usually brown or blue, and thus are not true albinos.For example, the Paso Fino Horse Association registers cremellos and other homozygous creams as "albino.However, the diagnosis of albinism in humans is based on the presence of vision problems.However, there is no reported case of an albino horse.Patches of unpigmented skin, hair, or eyes due to the lack of pigment cells (melanocytes) are called piebaldism, not albinism nor partial albinism.There are also references in literature to "albino" horses
Edited sentence: "   All so-called "albino" horses have pigmented eyes, usually brown or blue, and thus are not true albinos.Dominant white in horses is caused by the absence of pigment cells (melanocytes), whereas albino animals have a normal distribution of melanocytes.For example, the Paso Fino Horse Association registers cremellos and other cream colors as "albino.However, the diagnosis of albinism in humans is based on visual impairment, which has not been described in white horses.In other animals, patches of unpigmented skin, hair, or eyes due to the lack of pigment cells (melanocytes) are called piebaldism, not albinism nor partial albinism.In other mammals, the diagnosis of albinism is based on the impairment of tyrosinase production through defects in the Color (C) gene.No mutations of the tyrosinase or C gene are known in horses.There are also references in literature calling white horses "albino.There is no reported case of an "albino" horse, despite references to so-called "albino" horses