本文件与ISO？15004-1和ISO？15004-2一起，规定了用于直接观察眼底的手持式直接检眼镜的最低要求和试验方法。 如果存在差异，本文件优先于ISO？15004-1和ISO？15004-2。

This document, together with ISO？15004-1 and ISO？15004-2, specifies minimum requirements and test methods for hand-held direct ophthalmoscopes designed for directly observing the eye fundus. This document takes precedence over ISO？15004-1 and ISO？15004-2, if differences exist.