Charles Munnerlyn (born 1940 in Shreveport, LA) is an American optical engineer. He constructed the first working excimer laser system for vision correction in 1985, and also developed the Munnerlyn Formula that dictates the amount of corneal tissue to be removed by the laser to correct vision disorders such as myopia and astigmatism. Munnerlyn is the founder of VISX, Incorporated, once the world's largest manufacturer of laser-based vision correction (LVC) systems. VISX is now owned by Abbott Laboratories.