After 2 weeks of taking spiriva. Woke one morning with a 1/8" wide arc of blood around 1/2 the iris of my eye. I have stopped taking it but dr. doesn't think it was the spiriva. Since I never had that happen before and spiriva was the only new thing added-I think it was. I am 66 with aging eyes anyways, don't want to take a chance. What do you think??