Fifteen years ago, Winston resident Kazuko Renes was so depressed she could barely leave the house. Over the previous three decades, her eyesight had deteriorated until she was blind. Her life started to change in 2006. Her daughter Keri Pratt of Melrose made her promise to say “yes” to Pratt’s next request and then asked her to go to Disney World. Renes, 75, was about to take a big step and knew she would have to get help first. “I was afraid to go places. I always bumped into people because I didn’t know how to use my cane. I …