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Related Experiment Videos

Hexagonal keratotomy for intraocular lens miscalculation.

L O'Dell1, P Wyzinski

  • 1Northwest Eye Center, Eugene, OR 97401.

Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
|December 1, 1990
PubMed
Summary
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A 67-year-old woman experienced hyperopia and anisometropia due to an intraocular lens calculation error. Hexagonal keratotomy later corrected this, resulting in a significant myopic shift and improved uncorrected visual acuity.

Area of Science:

  • Ophthalmology
  • Refractive Surgery

Background:

  • Cataract surgery requires precise intraocular lens (IOL) power calculation.
  • IOL calculation errors can lead to refractive errors such as hyperopia and anisometropia.
  • Hexagonal keratotomy is a surgical procedure used to correct refractive errors.

Observation:

  • A 67-year-old female patient developed hyperopia and anisometropia following cataract surgery.
  • The refractive error was attributed to a miscalculation of the intraocular lens power.
  • The patient underwent hexagonal keratotomy seven years after the initial surgery.

Findings:

  • Hexagonal keratotomy, performed under topical anesthesia with a 5-mm marker, induced a myopic shift of 4.37 dioptres.
  • The patient achieved an uncorrected visual acuity of 20/25 after the procedure.

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  • The surgical intervention effectively corrected the previously induced hyperopia and anisometropia.

    • Implications:

    • Hexagonal keratotomy can be an effective treatment for refractive errors resulting from IOL calculation errors.
    • This case highlights the importance of accurate IOL power calculation in cataract surgery.
    • Surgical correction options should be considered for managing long-term refractive complications post-cataract surgery.