I've also had more trouble seeing after using 1 spritz of Nasonex in each nostril once a day (for several months). I've also felt progressively more tired. Most concerning, and my reason for being here, is that I developed a Rosacea-like condition. My dermatologist dx'd me with mild Rosacea, which is unbelievable to me, as my family line has nothing like this in it. When I did a Net search on Rosacea, it mentioned that steroids can cause this condition. Also, Rosacea is progressive and can damage the eyes and even cause loss of vision. So, if you suspect that this nasal steroid is affecting your vision, I'd recommend getting off of it. Oral and nasal steroids can become systemic if taken for long periods of time. This is common knowlege in medical circles. I took myself off of Nasonex today and am already starting to feel better.