Table 1. Comparison of Commercial Handheld OCT Systems to the Prototype Handheld OCT System.

Specification	Bioptigen Envisu	Optovue iVue	Prototype Handheld
OCT Technology	SD-OCT	SD-OCT	SS-OCT
Imaging Speed	32,000 A-scan/s	26,000 A-scan/s	350,000 A-scan/s
Imaging Range in Tissue	1.7 mm (C2200) 2.5 mm C2300)	2 – 2.3 mm	3.08 mm
Axial Resolution in Tissue	6 µm (HR source) 3 µm (VHR source)	5 µm	10 µm
Operating Wavelength	~840 nm	~840 nm	~1060 nm
Scanning Mirror Type	Galvanometer	Galvanometer	2D MEMS
Dimensions (L x H x W)	23 cm x 18 cm x 8 cm (including lens)	28 cm x 32 cm x 14 cm	15 cm x 18 cm x 7 cm (Power Grip) 16 cm x 10 cm x 14 cm (Camcorder)
Handheld Weight	1.5 kg (with lens)	2.2 kg	0.50 kg (Power Grip) 0.42 kg (Camcorder)
Refractive Error Correction	Manual	Motorized	Manual
Display on Handheld	N/A	LCD Touch Screen	LCD Screen
Alignment Aids	OCT Preview Scans	OCT Preview Scans IR Camera Fixation Target	OCT Preview Scans Iris Camera Fixation Target
Ophthalmic Imaging	Retinal Anterior Segment	Retinal Anterior Segment	Retinal