 Tay first described the red spot on the retina of the eye in 1881, while Sachs provided a more comprehensive description of the disease, and in 1887 noted its higher occurrence in Ashkenazi Jews from Eastern Europe.Sachs published several books, including "Nervous and Mental Disorders from Birth through Adolescence", a reference work intended for professionals.In 1926 he published "The Normal Child", a popular manual on child rearing intended for the general public.