Walked about 0.2 miles around neighborhood

I started to walk 0.62 miles around the neighborhood, but we stopped to talk with a neighbor. During our talk, I felt dizzy and had to hold my wife's hand to keep my balance. The dizziness wasn't the dizziness I felt when my heart stopped beating; it was the dizziness I've felt for a couple of years when I'm in the dark or my eyes are shut. After we finished talking, we continued our walk. I felt off-balance and turned around and went home. We were out in the evening after dark, and I lose my balance when it is dark or when I close my eyes during the day. I think I'll use my cane when we go out in the evening after the sun is down.