Before revision: Landolt C optotypes in various sizes and orientations Golovin-Sivtsev Table The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision.
After revision: Landolt C optotypes in various sizes and orientations Golovin–Sivtsev Table The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision.