Laser-Based Strategies to Treat Diabetic Macular Edema: History and New Promising Therapies

Table 1

Comparison of subthreshold micropulse laser (SDM) systems.

Model name (manufacturer)	PASCAL streamline 577 (Topcon)	IQ810 (Iridex)	2RT (Ellex)
Category	End point treatment	Subthreshold micropulse laser	Retinal rejuvenation therapy
Laser type	Optically pumped semiconductor	Diode	Q-switched green
			YAG laser
Wavelength	577 nm	810 nm	532 nm (green)
Pulse duration	10 to 1000 ms	CW pulse: 10–9000 ms	3 ns
		Micropulse: 0.025–1 ms
Power	30–150 mW	0–2000 mW	Energy: 0.6–1.2 mJ
	150–2000 mW		Fluence: 200 mJ/cm^2
Spot size	60/100/200/400 m	125 m	400 m
Dosimetry	N/A	N/A	N/A