Edward Jackson

Edward Jackson (March 30, 1856 - October 29, 1942) was an American ophthalmologist better known for popularizing retinoscopy in the United States. He also described detecting astigmatism and its correct axis using a cross-cylinder. The modified Stokes lens he made was later known as Jackson's cross-cylinder. Biography Edward Jackson was born March 30, 1856, in West Goshen Township, Pennsylvania, the son of Holiday and Emily Jackson. He completed his Bachelor of Science in Civil Engineering from Union College, New York in 1874, and in 1878 received his medical degree from the University of Pennsylvania. Jackson married Jenny L. Price in 1878. After she died in 1896, he settled in Denver in 1898, where he married Emily Churchman. Jackson died of heart block on October 29, 1942, at the age of 86.