Charles Davenport's Syringe

Origin
Charles Benedict Davenport (1866 – 1944) was a prominent American eugenicist and biologist. He was one of the leaders of the American eugenics movements. Eugenics is the study of or belief in the possibility of improving the qualities of the human species or a human population. They do this using such means as discouraging reproduction by persons having genetic defects or presumed to have inheritable undesirable traits. Together with his assistant Morris Steggerda, Davenport attempted to develop a comprehensive quantitative approach to human miscegenation, or the mixing of different racial groups through marriage, cohabitation, sexual relations or procreation. After their research together Davenport and his wife wrote four essays that pertained to human hereditary genes including but not limited to hair and eye color along with skin pigmentation. These essays helped pave the way for eugenics to be taught in schools across the nation.

Effects
Contains a liquid that can change eye color if injected into face, however there's a 3 in 5 chance of eyes rapidly changing color before blinding user for a week.