Loss of peripheral vision

Discussion in 'Eye-Care' started by robgoog, Aug 22, 2006.

  1. robgoog

    robgoog Guest

    I have developed a sight problem within the last 5 years, where part of
    my peripheral visual field has gone in both eyes. The scotoma (I think
    that's the right word) are just above the central vision. If I stand in
    front of an Amsler grid and blink each eye separately, I can see dark
    areas where the vision has gone. My right eye is worse, it's a
    triangular area, arced at the bottom, the left eye just appears to be a
    line going from outside to above centre. Luckily they don't overlap too
    much so I can see pretty well still, but where they do overlap, a line
    of light is apparent, just like I've stared at, e.g. a striplight for
    too long. I have been too & fro to eye specialists and had many tests
    (including MRI scan), but they are stll unclear as to what has caused
    this problem and whether it's likely to get worse.

    I had a field test at the optician in 2002 when I first started
    noticing something and that was more or less clear. I 've had several
    field tests over the last year and they all show up blind areas very
    similar to what I see when I do my own blink test. But (fingers
    crossed!) they don't seem to be getting worse. However, I have my
    doubts as to whether a field test can show up small variations, the
    printed results look pretty rough & ready.

    According to the specialists, the area of loss closely corresponds to
    optic pits I have in the optic disc area of both eyes. I recently had a
    OCT photo done and that confirmed that the retina is thin around this
    pitted area. The specialists have discounted glaucoma mainly due to
    normal pressure and my age (50). They think the cause may be something
    to do with exercise induced migraines I get from time to time, but very
    infrequently and only when I work out (running) really hard, e.g. it's
    been over a year since the last one. I only mentioned the migraines to
    them because what I see now is similar to the starting part of the
    aura.

    I would really appreciate other opinions on this, or similar
    experiences, just to try and home in on what is going on, because at
    the moment, I don't know whether this is a progresive thing or a one
    off?

    Thanks, Rob
     
    robgoog, Aug 22, 2006
    #1
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  2. robgoog

    Don W Guest

    So the pits are the cause of the gray spots?

    Don W.
     
    Don W, Aug 22, 2006
    #2
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  3. robgoog

    gudrun17 Guest

    Have you seen a glaucoma specialist? There are people in their 40s and
    50s who develop normal tension glaucoma--I am one of them--and with
    that kind of glaucoma there may be loss in the para-central area such
    as you describe. A glaucoma specialist would not presume you do not
    have glaucoma merely because your IOP's are in the normal range and you
    are 50.
    -Gudrun
     
    gudrun17, Aug 23, 2006
    #3
  4. robgoog

    robgoog Guest

    Don, the link didn't take me anywhere? What's an FA? Rob
     
    robgoog, Aug 23, 2006
    #4
  5. robgoog

    robgoog Guest

    Gudrun, as far as I know, none of the specialists I have seen
    specialize in glaucoma. I will certainly ask the next time I talk to my
    specialist. I've always had my suspicions about NTG but kind of ruled
    it out because, apart from the pits, the examinations haven't shown up
    any other obvious signs of damage to the optic disc. Rob
     
    robgoog, Aug 23, 2006
    #5
  6. robgoog

    Don W Guest

    Rob, ?? No link given. But the FA is a fluorescein angiogram. Checks the
    integrity of the retinal vascular system. A grey spot can occur if you have
    leakage. Good luck.

    Don W.
     
    Don W, Aug 23, 2006
    #6
  7. robgoog

    gudrun17 Guest

    Well, in my case because I am myopic, damage to the optic disk was hard
    to distinguish from what is normal for myopia, and so for a long time I
    was told it couldn't be glaucoma because my IOP's were (and still are)
    normal, and there was no apparent optic nerve change. Like you, I was
    also initially suspicious of NTG but the opthalmologists I was seeing
    told me I didn't have it. It took a couple of glaucoma specialists to
    come up with the diagnosis.

    Glaucoma damage is progressive so if you have not seen any change in a
    number of years, it may be ruled out but I'd think a glaucoma
    specialist, who is expert in analyzing the health of the optic nerve,
    would be able to determine what sort of optic disk anomaly you have and
    whether it is the cause of your vision loss.
    -Gudrun
     
    gudrun17, Aug 24, 2006
    #7
  8. robgoog

    robgoog Guest

    Trouble is Gudrun, I don't know if it is getting worse or not. I feel
    at the moment it is but my problem is more noticeable depending on
    amount of light. With summer on us and more light, it's more
    noticeable. Flourescent lights are bad too. It also seems more
    noticeable when I'm tired, run down, under the weather. Which I have
    been recently. It would be really good if there was a more accurate way
    of measuring it than the field test.

    I'm having a field test on both eyes next week to see if I meet the
    requirements for driving. Scary!

    Rob
     
    robgoog, Aug 25, 2006
    #8
  9. robgoog

    gudrun17 Guest

    In my case I see better in bright light, but the damaged area doesn't
    vary whether I am tired or under particular lighting. It's always
    there, just less bothersome on a sunny day.

    A glaucoma specialist can determine optic nerve fiber loss more
    precisely using tests such as OCT (optical coherence tomography), HRT
    (Heidelberg retina tomograph), or GDX nerve fiber analysis, although
    none of these tests by themselves are diagnostic.

    -Gudrun
     
    gudrun17, Aug 27, 2006
    #9
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