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Related Experiment Videos

Differences in incision shape based on the keratome bevel.

J Akura1, T Funakoshi, K Kadonosono

  • 1Kushimoto Rehabilitation Center, Kushimoto, Japan. akura@skyblue.ocn.ne.jp

Journal of Cataract and Refractive Surgery
|May 30, 2001
PubMed
Summary
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The bevel direction of a keratome significantly influences corneal incision shape. Understanding these differences is crucial for developing new surgical knives and achieving precise incision geometry.

Area of Science:

  • Ophthalmology
  • Surgical Instrumentation
  • Biomaterials

Background:

  • Keratome bevel design is a critical factor in ophthalmic surgery.
  • Incision characteristics can impact surgical outcomes and wound healing.

Purpose of the Study:

  • To investigate how different keratome bevel orientations affect the shape of corneal incisions.
  • To compare incision geometry produced by bibevel, bevel-up, and bevel-down keratomes.

Main Methods:

  • Experiments utilized three keratome types: bibevel, bevel-up, and bevel-down.
  • Incision shapes were evaluated on polyvinyl chloride and polyurethane sheets, and subsequently on artificial corneal domes (polyvinyl chloride and silicone).
  • Blade entrance and exit plane incisions were analyzed.

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Main Results:

  • Bibevel keratomes created linear incisions.
  • Bevel-up keratomes resulted in inverse-V shaped incisions.
  • Bevel-down keratomes produced V-shaped incisions.
  • Incision shapes were consistent across artificial sheets and domes.

Conclusions:

  • Keratome bevel orientation directly dictates the resulting incision shape.
  • Findings provide valuable data for the design of novel ophthalmic surgical knives.
  • This research aids in the consistent creation of incisions with specific, desired shapes.