Alcance
                            This document specifies the measurement data output formats for devices used in general ophthalmic examiniations, including the following modalities:—    Refractometer (REF)   Refraction—    Keratometer (KM)        Corneal curvature—    Tonometer (TM)            Intraocular pressure—    Lensmeter (LM)             Spectacle lens power—    Phoroptor (PHOR)         Visual acuityThis document only addresses text-based device reporting of ophthalmic examination device data (OEDD). Images generated as needed during an ophthalmic examination are outside the scope of this document.