I am a type 1 diabetic who had suffered from retinopathy and had laser treatment in both eyes. I started wearing the mask over 8 years ago and after a year I was discharged from the eye clinic and never suffered any further bleeds or was in need of any further treatment since.
The Noctura 400 is comfortable to wear with no side effects.
Wearing the mask and keeping my blood sugars in range has prevented any further treatment with my eyes.
I still have eyes examinations for diabetic review every year.
I would highly recommend the Noctura 400.