Fig. 2
From: Lamina cribrosa curvature depth and index as novel parameters in Graves’ ophthalmopathy
Lamina cribrosa (LC) measurements in the enhanced-deep-imaging optical coherence tomography image through the optic nerve head. The LC depth (yellow line) is measured as the distance between the horizontal line (red line) connecting Bruch’s membrane limit points (Bruch’s membrane opening (BMO)) and the anterior surface of the LC. LC thickness (black line) is measured as the vertical height between the anterior and posterior surfaces of the LC. The LC surface reference line (LCCW) (green line) was defined as the width of the line connecting the two points on the anterior LC surface that met the lines drawn from each BMO termination point perpendicular to the BMO reference line. The maximum depth from the reference line to the anterior LC surface was defined as the LC curve depth (LCCD) (blue line). The lamina cribrosa curvature index (LCCI) was calculated as (LCCD/LCCW) X 100.
