DR. FAISAL QAYOOM SHAH

Prof.TARIQ SYED QURESHI

Abstract

Purpose: To determine significance of findings on orbital computed tomography in classifying ocular injuries into Open Globe or Closed Globe

Methods: 604 patients with suspected foreign body, in our case pellet, were studied. All patients did undergo helical CT direct scanning in axial plane and multiplanar reconstruction of coronal and sagittal planes. The images were studied by masked observers, one radiologist and two ophthalmologists.

Results: The overall sensitivity, specificity and accuracy of CT for determining open-globe injury was 89.89%, 92.04% and 90.57% respectively. Positive predictive value ranged from 93.85% to 97.51% and negative predictive value from 76.01% to 84.80%. Positive likelihood ratio and negative likelihood ratio was found to be 11.29(7.05-18.09) and 0.11(0.08-0.15). Also intraconal foreign body correlated more to open-globe injury than extraconal foreign body.