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Medical Forum / General / Vision / May 2006Vision fluctuations
I'm on a waiting list for a cancellation to see my opthalmologist, as I have been having extreme fluctuations in my vision on a daily basis. I'm a "high myope" - my most recent prescription is -9.00 - and I have been happily wearing progressive lenses at that prescription for the past 2 years. About 9 weeks ago, I started taking Prednisone for polymyalgia rheumatica and am now taking 10 mg daily, doing a gradual taper. For the past couple of weeks, I find that my vision is "normal" in the morning, but by mid-day, I have become increasingly myopic, and eventually I have to resort to a pair of glasses I got many years ago, which are probably over -10.00 (my first bifocals). My vision is so poor with my "normal" glasses, than I can't (or shouldn't!) drive. This increased myopia persists pretty much until the end of the day. This is a daily occurrence. I have never been diagnosed as diabetic, and I had a random blood sugar test since this started - the reading fell within the normal range. While waiting for the opthalmologist appointment, I saw an optometrist, who attributed my problem to "corneal hypoxia", as I told him that the first time my vision "crashed" was when I was wearing a pair of multifocal contacts (which I absolutely loved and had only been using for a month as daily wear). However, he refused to believe that my vision fluctuated, and insinuated that I just needed a new prescription, and said I should stop wearing contacts, so I have, for now. (But I really want to again!) My own feeling is that the prednisone is playing havoc with my blood sugar. Any insights???? Prednisolone can cause increases in ocular pressure. You may be a high responder and getting problems from this. Check it with your doc. dr grant > My own feeling is that the prednisone is playing havoc with my blood > sugar. Any insights???? You could be right. You'd also expect thirst and polyuria if your BG was high enough, long enough to affect your refraction. -MT > I'm on a waiting list for a cancellation to see my opthalmologist, as I > have been having extreme fluctuations in my vision on a daily basis. [quoted text clipped - 6 lines] > For the past couple of weeks, I find that my vision is "normal" in the > morning, but by mid-day, I have become increasingly myopic, and > My own feeling is that the prednisone is playing havoc with my blood > sugar. Any insights???? I'm no doctor, or any kind of expert, but I know from personal experience that this kind of drug can cause high ocular pressure, and that high ocular pressure can cause vision problems.  SignatureDan Abel dabel@sonic.net Petaluma, California, USA Indeed, elevated blood glucose is a common side effect of prednisone. Your assumption that there may be a relationship with your vision fluctuation may be correct. Prednisone also causes sodium retention, which in turn causes water retention so that polyuria may not be present. DrG Indeed, elevated blood glucose is a common side effect of prednisone. Your assumption that there may be a relationship with your vision fluctuation may be correct. Prednisone also causes sodium retention, which in turn causes water retention so that polyuria may not be present. DrG Thanks to everyone for your responses. I've experimented a little (early days yet) and definitely when I had white flour pancakes with maple syrup for breakfast, my vision that day was much worse than with granola & strawberries! ;-> Would intraocular pressure cause increased myopia on such a short term basis? Is there any way the fluctuating myopia could be caused by corneal hypoxia? If not, I'd like to go back to wearing contact lenses, at least for a few hours at a time when I go horseback riding. They're extremely comfortable, and I can still use my monovision pair if the multifocals aren't recommended, although I find the multifocals even more comfortable to wear. My optician didn't see any evidence of corneal hypoxia, and I think the optometrist just made the diagnosis based on what I told him about having the contacts in the first time my myopia worsened. > Indeed, elevated blood glucose is a common side effect of prednisone. > Your assumption that there may be a relationship with your vision [quoted text clipped - 3 lines] > > DrG |
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