Fig. 1

Clinical and imaging features at presentation and at last follow-up visit: A: Left eye fundus photograph (Optos®, Daytona, USA) demonstrates a subtotal temporal macula-off retinal detachment with retinal corrugations and a large oval retinal break at the temporal retinal periphery with rolled-up posterior margins (black arrow). There was no demarcation line identified (white arrow). B-E: Optical coherence tomography (OCT) scans passing through the macula on the same day before the pneumatic retinopexy procedure and on days 1, 2, and 11 after the procedure reveal a progressive decrease in subretinal fluid and retinal reattachment. The infrared images on the OCT scans demonstrate the formation of the demarcation line as a hyperreflective white band extending from the nasal aspect of the fovea to the inferior arcade. F: This postoperative fundus image obtained at the most recent follow-up appointment demonstrates retinal reattachment and clearly identifies the demarcation line at the junction of the attached and previously detached retina (white arrow)