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Medical Forum / General / Vision / March 2006Any tests for NAION?
Hi, I'm 37 and have always had one eye with really good vision and one not so good. Never worn glasses and have never really had any problems without them. I started using Kamagra (Viagra derivative) 6-7 months ago and have now noticed that i have to focus a lot more, night vision and lights make things more difficult and my eyesight generally has deteriorated. I have read that Viagra can cause NAION (nonarteritic anterior ischemic optic neuropathy) in certain people. I have a small heart murmur (mitral valve prolapse) and have read that there may be a link between Viagra, heart disease patients and NAION although it has not been 100% proven. It may be total coincidence, but as i have an eye test booked to get glasses/ contacts, I wondered how i would go about being tested for NAION. Many Thanks Paul There are a number of tests that help diagnose naion: visual acuities visual fields pupil testing color testing fundus exam of the optic nerve I wouldn't lose any sleep yet, your visual changes may just be normal refractive changes. I am not entirely convinced with the relationship of optic neuropathy and viagra. frank Thanks for your advice Frank. I suspect you're right. Are any of these tests the sort of thing i could ask for during my standard eye test? PS I'm already colour blind > There are a number of tests that help diagnose naion: > visual acuities [quoted text clipped - 9 lines] > > frank > Are any of these tests the sort of thing i could ask for during my > standard eye test? > PS I'm already colour blind They're all pretty standard. If the doctor knows you're looking for optic nerve problems, he might order a more thorough visual field. The "color" test would be done differently, but you can do this yourself. "Color blindness" like yours is almost always the same in both eyes. Optic neuropathy is seldom the same in both eyes, and red is usually affected first, more than other colors. So pick out a small object with colored bright, primary red, and make sure it's the same shade of red in each eye. In optic nerve disease, one eye often sees red as pale and washed-out, like $1.00 worth of red in one eye, and "50 cents worth" in the eye with optic nerve compromise. >> just be normal refractive changes. I am not entirely >> convinced with the relationship of optic neuropathy >> and viagra. I agree with Dr. Frank. The group of people who take Viagra are the same group who tend to get NAION, and the incidence isn't all that different with Vitamin V. Thanks for the info. I'm in the UK but i assume all tests are pretty standard. I think i'll mention it to him all the same just for peace of mind and see if there's a quick check he can do. >>Are any of these tests the sort of thing i could ask for during my >>standard eye test? [quoted text clipped - 21 lines] > group who tend to get NAION, and the incidence isn't all that different with > Vitamin V. Had my test. Optician siad she didn't notice any optic nerve damage and i was given a visual field test which she also said was ok > Thanks for the info. I'm in the UK but i assume all tests are pretty > standard. I think i'll mention it to him all the same just for peace of [quoted text clipped - 25 lines] >> same group who tend to get NAION, and the incidence isn't all that >> different with Vitamin V. Hey, that's good to hear. Did she find any refractive changes that explained your blur symptoms? frank She di find refrective changes and prescribed glasses. My figures were -1.25 in the right eye and -0.5 in the left with astigmatism in both. They tell me that it is only a relatively mild prescription. > Hey, that's good to hear. Did she > find any refractive changes that > explained your blur symptoms? > > frank It is a mild prescription and it should take care of your original symptoms (especially driving @ night). frank I wonder if the viagra is causing your eyes to become drier and thusly affecting your vision. |
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