The most famous mathematician known to be blind is Leonhard Euler.
Euler was a prolific Swiss mathematician and physicist who made significant contributions to various fields, including calculus, number theory, and graph theory. He was born in Basel, Switzerland, in 1707 and lost his sight in his right eye in 1738 due to a fever. He eventually lost sight in his left eye in 1766, but continued his work with the help of his assistants and a remarkable memory.
Despite losing his sight, Euler continued to make groundbreaking discoveries in mathematics. His work on the Euler's Identity (e^(iπ) + 1 = 0) and the Euler's Totient Function are just two examples of his incredible contributions. He was truly a pioneer in the field of mathematics, and his work continues to inspire mathematicians to this day.