High-Resolution Ex-Vivo Imaging of Retina with a Laptop-Based Portable Endoscope

Table 1

Comparison of the ophthalmic endoscopes.

	Endo optics E4	Portable endoscope
Dimension	164 × 57 × 57 cm	32.5 × 21.6 × 17 cm
Handpiece length	5 cm	18 cm
Portability	Restricted	Portable
Probe diameter	19 G, 23 G, 25 G	19 G
Focus	Adjustable	Non-adjustable
Angle of view	110°–140°	120°
Resolution	6,000–17,000 pixels	40,000 pixels
Light source	Xenon (external)	LED (built-in)
	Adjustable	Non-adjustable
Video output	Separate-video	USB
Cost	Over US$ 30,000	US$ 500