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Related Experiment Videos

Astigmatism following cataract surgery.

V M Reading

    The British Journal of Ophthalmology
    |February 1, 1984
    PubMed
    Summary

    Post-cataract surgery, corneal curvature changes rapidly, leading to astigmatism. Smaller incisions, like in phacoemulsification, minimize these changes, reducing surgically induced astigmatism.

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    Area of Science:

    • Ophthalmology
    • Microsurgery
    • Corneal Physiology

    Background:

    • Intracapsular cataract extraction (ICCE) using microsurgical techniques can induce significant changes in corneal curvature.
    • Astigmatism, particularly against-the-rule astigmatism, is a common outcome following cataract surgery.
    • Understanding these changes is crucial for optimizing surgical outcomes and patient vision.

    Purpose of the Study:

    • To analyze the temporal changes in corneal curvature after intracapsular cataract extraction.
    • To compare the effects of different surgical incision sizes on corneal curvature and astigmatism.
    • To identify methods for minimizing surgically induced astigmatism.

    Main Methods:

    • Photokeratometric measurements were taken at regular intervals over one year post-surgery.
    • Comparison between intracapsular cataract extraction (ICCE) with large and small incisions.
    • Evaluation of phacoemulsification technique with smaller incisions.

    Main Results:

    • Rapid changes in astigmatism and its axis occurred within the first postoperative month after ICCE.
    • Astigmatism against-the-rule became predominant after the initial postoperative period.
    • Phacoemulsification resulted in smaller changes in corneal curvature due to smaller incisions and fewer sutures.

    Conclusions:

    • Surgical incision size significantly impacts post-operative corneal curvature changes and induced astigmatism.
    • Phacoemulsification offers an advantage in minimizing surgically induced astigmatism compared to traditional ICCE.
    • A procedure to minimize surgically induced astigmatism following cataract extraction is proposed.

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