An effective treatment for the visual effects of prediabetes: DMSO
If you qualify to take DMSO - not too dose dependent medications, not too acutely toxic supplements, not too much tattoo ink, no botox, no dissolvable medical implants, not pregnant nursing or trying to conceive, no difficulties having your blood clot, and you can get away with smelling badly sulfury while using it (and for up to 72 hours after stopping taking it) - There are some desirable effects (like reversing symptoms of glaucoma and the visual effects of insulin sensitivity, and otherwise sharpening your depth perception and visual acuity - it has for me) it could have on you.
First, how to take it precautiously - Take it with a clean mouth, brush floss rinse and thoroughly water rinse, maybe try and wait 30 minutes before taking it and 30 minutes after taking it to eat or drink anything that isn't water.
Take it in a clean glass cup with purified water, as it can dissolve plastic, glaze, and impurities and convey that directly into your bloodstream.
DMSO is the same solvent used in things like nicotine patches and medical fentanyl patches to convey the stuff into your bloodstream through your skin.
Chug it, chase it with a bunch of purified water. DMSO in extended contact with tissues can make those tissues more permeable to contaminants for more than an hour.
The most I've ever taken is 5 mL (99.9% pure) a day for 7 days in a row - No apparent toxic effects.
Edit: I read about some dude in Germany who took a huge amount of DMSO (maybe they said like a whole liter of it) as a 'miracle cure' and it destroyed his liver and other organs and killed him - That is a huge amount, as the human blood volume is only 4.5 to 5.7 L depending on sex, age, height and weight - buddy didn't solve his health, he dissolved his health.