Diabetic retinopathy is the most common cause of blindness caused by diabetes. Diabetes reduces the supply of oxygen to the retina.
The retina is especially oxygen-starved at night. In response to this demand, the body signals for additional blood vessels to be formed in this region. These new blood vessels are very weak and the leaking of these blood vessels eventually leads macular edema, which destroys a patient's eyesight.
PolyPhotonix has developed a solution that intervenes in this process by preventing a patient's eyes from dark-adapting while the patient is asleep. Dark adaptation: the physical and chemical adjustments of the eye that make vision possible in relative darkness. These adjustments include dilation of the pupil and increased activity of rods in the retina.