Over deze norm
||Intra-oculaire lenzen en contactlenzen
General purpose focimeters are intended for measurement of contact lenses, single-vision, multifocal and progressive-power or degressive-power spectacle lenses, both uncut and mounted in spectacle frames, and for the orientation and marking of spectacle lenses. This International Standard applies to instruments typically intended for use by the ophthalmic community, with the capability to demonstrate conformity of lens products with the International Standards existing for these lenses. This part of ISO 8598 specifies requirements and test methods for general purpose focimeters designed for the measurement of vertex powers, cylinder axis, prismatic power and prism base setting at a specified point of a lens within the area defined by the size of the focimeter aperture. This excludes instruments that can only measure the whole lens at once.