This American National Standard@ together with ISO 15004-1 and ANSI Z80.36@ specifies requirements and test methods for slit-lamp microscopes to provide slit illumination and observation under magnification of the eye and its adnexa. This American National Standard is not applicable to microscope accessories@ e.g. photographic equipment and lasers. This American National Standard takes precedence over ISO 15004-1 and ANSI Z80.36@ if differences exist.