Elwin Marg (March 23, 1918 – July 15, 2010) was an American optometrist and neuroscientist at the University of California at Berkeley.
He was the first to receive a PhD from UC Berkeley School of Optometry.
It was he who gave the name electrooculogram, a technique for measurement of nerve impulse in the eye.He developed an improved tonometer that avoided use of anaesthetics for the first time in optometrical diagnosis.
With his wife he established a non-profit neuroscience organisation, the Minerva Foundation in 1983.