Will a 50 mg tablet Losartan affect vision? Or at 55, is middle age just advancing on me?

I've been on Losartan since last winter. I don't think it did anything to my reading glasses situation. I'm still using the same strength lens as before. However, I started getting other kinds of visual disturbances. The most frequent being I think I see a flash of light to the extreme side of my vision. But it's only happening on my right side. There are some other things I don't know how to describe. Maybe it's called Tunnel vision, because I feel like I'm looking through a tunnel. My vision is normal in the center but blurry all around. This comes and goes too.

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Now besides Losartan I also take Lasix. I was given this horse pill with the Lasix and it's a Potassium pill. It's so hard to swallow I wasn't taking it. But I was warned by 2 docs that Lasix will deplete me of Potassium, so they said I MUST take the Potassium. But I wasn't doing it. I have now been taking it religiously, for a few weeks. I think the visual disturbances are a lot less. My PCP says Potassium deficiency shouldn't cause visual disturbances, so he doubts that it's helping me, but I'm pretty sure it is. Which would mean it has nothing to do with the Losartan.

So I suggest you look for other reasons why your vision is getting worse. Age does effect our vision. I'm 4 years older than you, and I now need the reading glasses for every small thing I must see sharply. Several years back, I could still strain my eyes and see some small things well enough without the glasses. I have also noticed that fatigue or lack of sleep makes me worse. I have a stronger set of specs for those times.

But why not go see an eye doc to play safe? I intend to do that too.