I have been type 1 diabetic for 30 years and having laser treatment which I hated on a regular basis until I read about the Noctura sleep mask 10 year ago I signed up for it and have never looked back, after approximately using it for 9 month I no longer needed the laser treatment. The mask takes a little while to get used to but is not uncomfortable and I know if it hadn’t been for the mask I would now be blind