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Related Experiment Videos

Ocular massage before cataract surgery.

J T Ernest, T K Goldstick, M A Stein

    Transactions of the American Ophthalmological Society
    |January 1, 1985
    PubMed
    Summary
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    The Honan intraocular pressure reducer offers temporary relief for cataract patients, but its benefits aren't due to lasting pressure reduction. High pressures can occur with its use and during digital massage.

    Area of Science:

    • Ophthalmology
    • Biomedical Engineering

    Background:

    • Senile cataracts are a leading cause of vision impairment.
    • Managing intraocular pressure (IOP) is crucial in ophthalmic procedures.
    • The Honan intraocular pressure reducer is a device used to lower IOP.

    Purpose of the Study:

    • To investigate the duration of intraocular pressure reduction after using the Honan intraocular pressure reducer.
    • To assess the intraocular pressure generated during digital massage and Honan balloon application.

    Main Methods:

    • Ten subjects with senile cataracts were treated with the Honan intraocular pressure reducer.
    • Intraocular pressure was measured before and after device removal.
    • A phantom eye and a cadaver eye were used to measure pressure during digital massage and Honan balloon application.

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    Main Results:

    • A significant, yet transient, decrease in intraocular pressure was observed post-Honan balloon removal, dissipating exponentially with a 9.6-minute half-time.
    • Ophthalmic surgeons' digital massage on a phantom eye resulted in high variability and unexpectedly elevated IOP.
    • The Honan balloon, under certain conditions on a cadaver eye, could achieve very high intraocular pressures.

    Conclusions:

    • The therapeutic benefits of the Honan intraocular pressure reducer are not attributed to a sustained IOP reduction.
    • Preoperative digital massage and Honan balloon application can lead to potentially unsafe levels of intraocular pressure.
    • Further research is needed to optimize the use of IOP-reducing devices and techniques in cataract surgery.