SHAH, JAY RAJNIKANT. A Review of Astigmatism - A Refractive Error correctable by Cylindrical glasses. Journal of Drug Delivery and Therapeutics, India, v. 5, n. 2, p. 29–36, 2015. DOI: 10.22270/jddt.v5i2.1073. Disponível em: https://jddtonline.info/index.php/jddt/article/view/1073. Acesso em: 18 jan. 2026.