IOP level for seeing halos?

Discussion in 'Optometry Archives' started by MBS, Jan 14, 2005.

  1. MBS

    MBS Guest

    I have had intermittent cloudy vision with halos in my right eye (which
    has amblyopia)for several years. I have been to an opthalmologist and
    it was determined that on one occasion I had elevated pressures (30 in
    left, 32 in right). Almost all other times it was about 20/21. I now am
    treated with Xalatan and they are around 16. Doc said that the the
    angles looked fine and there was nothing else obvious with the eye. I
    get these episodes of cloudy vision with halos around lights about
    twice monthly and they last about one hour. They seem to occur more
    when I am stressed and in the first half of the day (not on awakening).
    There are no other symptoms.

    My main question is, if it was IOP, what levels would it take to
    produce these vision problems? Is it normal to get them with only open
    angle glaucoma? In light of the fact that I haven't gotten good
    answers, I am trying to set my mind at ease that I am not experiencing
    intermittent pressure spikes.
    MBS, Jan 14, 2005
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  2. MBS

    LarryDoc Guest

    It seems you've done some good research on this. The threshold of
    pressure that causes enough cornea edema to be visualized as halos or
    cloudy vision is individually variable and thought to be greater than
    28-30mmHg in sensitive people and much higher---around 40+ for most. And
    as you might know, pressures over 40 and spikes over 30 are caused by
    issues of outflow blockage----closed angles. The most common time for
    this to occur would be shortly before awakening, as you mentioned.

    If you experience symptoms while medicated with Xalatan, I'd be
    concerned and you should consult with a glaucoma specialist. There might
    be something your doctor missed. If it only occurred prior to treatment,
    then relax. From 16 to 30 or 40 is a giant leap and would have to be
    caused by transient blockage.

    Certainly, if you feel you are not getting good answers from your doc,
    seek a second opinion. Not just here, but by a professional who can
    examine you in person.

    --LB, O.D.
    LarryDoc, Jan 14, 2005
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  3. MBS

    MBS Guest

    Thanks for your answer. Could this possibly be caused by occular
    migraine? How would this be diagnosed?
    MBS, Jan 14, 2005
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