Achromatopsia Related Terms ACHM, achromatopia, acquired achromatopsia, autosomal recessive, color blindness, cone cells, congenital achromatopsia, nystagmus, photophobia, retina, rod monochromacy, vision disorder. Background Achromatopsia is a condition that leads to the inability to see color. About one in 30,000 people in the United States are affected with achromatopsia. This condition is much