Commercially available portable SDOCT systems useful for supine imaging. (A) Bioptigen Envisu system. 0.9-kg (2-pound) handheld scanner. Speed of 32,000 A-scans per second and 3.3-μm axial resolution for handheld imaging of premature infants to adults. (B) Optovue iStand system with a 2.3-kg (5-pound) head scanner supported by an articulating arm, with live en face image for targeting. Speed of 26,000 A-scans per second and a 5-μm axial resolution for supine patient imaging. Product labeling in 2012 for the iVue system with the iStand does not mention pediatric use. (A: Courtesy of Bioptigen, Inc., Morrisville, NC; with permission; B: Courtesy of Optovue, Inc., Fremont, CA; with permission.)