Use of Opportunistic Computed Tomography for Differentiating Intraocular Foreign Bodies

Purpose: To investigate the opportunistic use of diagnostic focused computed tomography (CT) imaging for differentiating intraocular foreign body (FB) types. Materials and Methods: From 2020 to 2024, 49 eyes of 41 consecutive patients with a diagnosis of FB who underwent diagnostic focused CT were prospectively included in this study. CT studies of patients who had direct contact with a known FB and those who had indirect contact with an FB and then underwent surgery were examined. The volume and density (in HU) of the FBs were measured and statistically analyzed. Results: The type of foreign body was determined by surgery in 34 patients with indirect injuries and by history in 7 patients with direct injuries. Metal was found in 21 eyes, rock in 8 eyes, bullet core in 10 eyes, wood in 2 eyes, glass in 7 eyes, and plastic in 1 eye. Industrial accidents were the cause in 20 patients, traffic accidents in 6 patients, gunshot injuries in 6 patients, and other types of injuries in 9 patients. 21 left eyes, 15 right eyes, and 5 bilateral eyes were affected. Statistical analyses revealed a significant difference in terms of density (HU) between metal and bullet core, rock-bullet core, wood-bullet core, and glass-bullet core (p