Hooray for your blood sugar! I would think that if you maintain a healthy diet following the cleanse, you should be able to maintain stable blood sugar.
My main reason for responding though was to talk about your vision change... My vision has changed over the last several cleanses that I've done - always for the better! I had a book from the library that talked about correcting your eyesight naturally. I never made it all the way through because it was too technical for me. It did however state that wearing contacts would hinder the eyes from correcting themselves. I haven't worn my contacts but maybe once or twice since I read that nearly a year ago. I only wore them when I was taking my kids to the swimming pool. So, yes, I believe the cleanse can help with your vision!! And as long as you maintain a healthy diet and continue to do the MC, I believe you can maintain or make your results better!!