Eyesight issues

I am on my penultimate day of a 28 day fast and have been having incredibly bad eyesight problems. My vision is usually moderately bad (I wear contact lenses) but really nothing extreme- I can see without my lenses, just with very poor focus. Today, even with my lenses, my vision is blurry and my eyes feel fuzzy. I've heard that if anything, fasting improves eyesight! It hasnt had any effect so far, but today my vision is so poor! I am restless and irritable and eager for this fast to end, so its driving me crazy! Anybody know anything about this? Thanks