ISO 8598-1:2014规定了通用焦距计的要求和试验方法，该焦距计用于在透镜指定位置的限制区域内测量顶点功率、圆柱轴、棱镜功率和棱镜底座设置。这不包括一次只能测量整个镜头的仪器。 本标准适用于眼科团体通常使用的仪器，能够证明眼镜镜片产品符合这些镜片的现有国际标准。

ISO 8598-1:2014 specifies requirements and test methods for general purpose focimeters designed for the measurement of vertex powers, cylinder axis, prismatic power and prism base setting within a restricted area at a specified location of a lens. This excludes instruments that can only measure the whole lens at once. It is applicable to instruments typically intended for use by the ophthalmic community, with the capability to demonstrate conformity of spectacle lens products with the International Standards existing for these lenses.