For anyone thinking of making their own therapy device, the paper has further details: > The 670 nm light devices were supplied by CH electronics (UK) and base

For anyone thinking of making their own therapy device, the paper has further details: > The 670 nm light devices were supplied by CH electronics (UK) and based on commercial DC torches with nine 670 nm LEDs mounted behind a light diffuser so that energies at the cornea were approximately 8 mW/cm2. 670 nm light was delivered down a white internally reflecting tube that fitted over the eye with an internal diameter of 3.2 cm. Standard through hole red LEDs are around 630-650 nm.