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Related Experiment Video

Updated: Apr 30, 2026

A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome
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New device for creating a continuous curvilinear capsulorhexis.

Matthew A Powers1, Malik Y Kahook1

  • 1From the Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, USA.

Journal of Cataract and Refractive Surgery
|April 29, 2014
PubMed
Summary
This summary is machine-generated.

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A new silicone device aids in creating continuous curvilinear capsulorhexis (CCC) during cataract surgery. This cost-effective tool offers precise manual CCC creation through small incisions, benefiting surgeons of all experience levels.

Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Surgical Devices

Background:

  • Manual continuous curvilinear capsulorhexis (CCC) has a steep learning curve.
  • Existing automated capsulotomy devices, like femtosecond lasers, are costly.
  • There is a need for accessible and effective CCC creation tools in cataract surgery.

Purpose of the Study:

  • To describe the development and evolution of a novel device for facilitating continuous curvilinear capsulorhexis (CCC).
  • To evaluate the efficacy of different prototype designs for CCC creation in ex vivo eyes.

Main Methods:

  • Bench-side ex vivo testing of five distinct prototype designs in bovine and human eyes.
  • Prototypes included nitinol-based devices, elastomeric suction, and silicone rings.

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  • Evaluation focused on insertion through small corneal incisions (sub-2.4 mm) and CCC performance.

    • Main Results:

    • The initial three designs failed insertion or adequate capsular cutting.
    • The fourth design, a nitinol guide wire and silicone ring combination, enabled manual CCC without radial tears through a 2.4 mm incision.
    • The final design, a freestanding micropatterned silicone ring, was insertable and exhibited self-adhesive properties.

    Conclusions:

    • A novel, medical-grade silicone device with an adhesive micropatterned design facilitates precise manual CCC.
    • This device is a viable, cost-effective alternative to existing methods for CCC creation.
    • The device is suitable for cataract surgery and can be used by surgeons with varying levels of experience.