In 1996, Kuhn et al. published a classification of ocular trauma terminology to promote standardization and eliminate confusion regarding mechanical eye injuries. This classification defines open-globe and closed-globe injuries caused by sharp or blunt objects that impact the eye and/or periocular tissues. Their definition of the eye wall included the sclera and cornea (Fig. 25.1 and Table 25.1). In 1997, the Ocular Trauma Classification Group presented a broader classification scheme that included the anatomical location of mechanical eye injuries and the resulting physiological changes in the eye, with the aim of allowing the categorization of ocular injuries at presentation, determination of visual prognosis, and use of standardized terminology in clinical trials. In addition to defining open- and closed-globe injuries, this classification included presenting visual acuity, the presence of a relative afferent pupillary defect, and zones to describe the location and extent of injury (Tables 25.2 and 25.3). Both of these trauma classifications focus on mechanical injuries and do not include descriptions of chemical, electrical, or thermal injuries of the eye.