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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Clinical Results After Precision Pulse Capsulotomy.

Kjell G Gundersen1, Richard Potvin2

  • 1iFocus Øyeklinikk AS, Haugesund, Norway.

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|January 6, 2021
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Summary

Automated precision pulse capsulotomy (PPC) resulted in a higher percentage of eyes with refractive cylinder less than or equal to 0.50 D compared to manual capsulorhexis. Other outcomes were equivalent between the two cataract surgery methods.

Keywords:
capsulorhexiscapsulotomycataract surgeryprecision pulse capsulotomy

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Area of Science:

  • Ophthalmology
  • Surgical Technology
  • Refractive Surgery

Background:

  • Cataract surgery involves creating a capsulotomy, a crucial step influencing refractive outcomes.
  • Manual capsulorhexis is the traditional method, while automated precision pulse capsulotomy (PPC) offers a newer technological approach.
  • Optimizing capsulotomy technique is essential for achieving precise refractive results and minimizing complications in cataract and refractive lens exchange surgery.

Purpose of the Study:

  • To compare residual refractive error and complication rates between manual capsulotomy and automated precision pulse capsulotomy (PPC).
  • To evaluate the impact of capsulotomy method on refractive outcomes, particularly residual cylinder, after cataract surgery with various intraocular lens (IOL) types.

Main Methods:

  • A retrospective chart review of 243 eyes (122 PPC, 121 Manual) that underwent cataract surgery or refractive lens exchange (RLE) with monofocal toric or trifocal IOLs.
  • Analysis included measurement of mean spherical equivalent (MRSE) and residual refractive cylinder.
  • Complication rates and best-corrected distance visual acuity were also compared between the manual capsulorhexis and PPC groups.

Main Results:

  • No statistically significant difference in MRSE was observed between the PPC and manual groups.
  • A significantly higher percentage of eyes achieved residual refractive cylinder ≤ 0.50 D in the PPC group (89%) compared to the manual group (79%) (p=0.03), particularly with toric IOLs.
  • While capsulotomy-related complications were lower in the PPC group (4.1% vs. 6.6%), this difference was not statistically significant (p=0.38).

Conclusions:

  • Automated precision pulse capsulotomy (PPC) leads to a significantly greater proportion of eyes with reduced residual refractive cylinder after surgery.
  • The PPC device demonstrated equivalent clinical results to manual capsulorhexis for other refractive measures and visual acuity.
  • PPC shows potential for improving refractive accuracy in cataract and refractive lens exchange procedures, especially when using toric IOLs.