Purpose: To analyze the corneal deflection amplitude (DA), as measured by the Corvis ST tonometer (Oculus), and other ocular parameters that could affect the DA in normal Korean eyes. Methods: A retrospective study was performed on 126 eyes of 126 normal Korean subjects. Intraocular pressure (IOP) was measured with Goldmann tonometry (IOP-G), and the Corvis ST was used to measure the corneal DA, central corneal thickness (CCT) and IOP; the biomechanically corrected IOP-B was measured with non-contact tonometry (IOP-N). Axial length (AxL), anterior chamber depth (ACD), and the mean keratometric value were obtained with the IOL Master instrument (Zeiss). The relationships between DA and other measurements were then evaluated. Results: The DA was positively correlated with AxL (p = 0.002) and ACD (p = 0.010), and negatively correlated with IOP-G (p < 0.001), IOP-N (p < 0.001), IOP-B (p < 0.001), and CCT (p = 0.006). However, when AxL, ACD, CCT, and each type of IOP were analyzed together, AxL (p = 0.016) and IOP-G (p < 0.001) were the parameters most significantly associated with the DA. Conclusions A longer AxL and greater ACD were associated with a higher DA, while a higher IOP and thicker CCT were associated with a lower DA. DA, one of the biochemical parameters of the cornea, was affected by multiple ocular factors, i.e., AxL and IOP. These factors should therefore be considered when interpreting DA measurements obtained using the Corvis ST.

Hemangioendothelioma is a rare vascular tumor characterized by endothelial tumor cells and variable malignant behavior, and it's not common for this lesion to involve the bone. Although there are a few reports of cranial involvement by hemangioendothelioma, only rare cases arising in temporal bone have been published. We present the radiologic findings of a 7-year-old boy who had a high grade hemangioendothelioma involving the temporal bone with intracranial extension. Evidence of flow voids on MR images suggested a tumor of vascular origin, and the ill-defined margins, cortical destruction and intracranial extension on the CT and MR images were correlated with the tumor's high histologic grade.
Brain Neoplasms/*diagnosis/therapy ; Child ; Hemangioendothelioma/*diagnosis/therapy ; Humans ; Magnetic Resonance Imaging ; Male ; Temporal Bone/*pathology ; Tomography, X-Ray Computed