help finding a movie

There is a certain kung fu film I would see on TV sometimes when I was a kid, and for the life of me I don't remember what it was called. It was probably from the 70s or 80s, and I think it took place during.
The only part I remember distinctly was the good guy fighting these these two old guys who would jump on each others shoulders, and they had mirrors on their belts that they would use to blind the good guy. Anyone have any idea what I'm talking about? I've been trying to figure it out off and on for 15 years and it's driving me crazy haha.