I just watched One Hour Photo again and I had a get a few more thoughts down. I love the dream sequence where Sy is in the middle of an aisle at the SavMart. The shelves are bare and everything is harsh, flourescent lit white. Sy opens his eyes and they are red. A drop of blood leaves a trail down his cheek just before everything that is dark and evil squirts out through his eyes. It's as if what he has just seen is making his head explode.
I love the cruel, harshly-white blandness of the SavMart and the interrogation room. I love the thematic repetition of "lenses" throughout.