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When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
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Related Experiment Video

Updated: Dec 21, 2025

Building a Simple and Versatile Illumination System for Optogenetic Experiments
06:41

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Self-Made Sleeve for Chandelier Light Simulation.

Michael Kruger1, Michael Sommer, Christoph Singer

  • 1Department of Ophthalmology, Medical University of Graz/Austria, Graz, Austria.

Retina (Philadelphia, Pa.)
|May 15, 2020
PubMed
Summary
This summary is machine-generated.

A novel cotton swab sleeve offers a cost-effective alternative to chandelier lights for vitrectomy. This simple, accessible tool enhances light probe handling during retinal detachment surgery, improving surgical efficiency.

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Area of Science:

  • Ophthalmology
  • Surgical Innovation

Background:

  • Chandelier lights are essential for vitrectomy but can be costly.
  • There is a need for affordable alternatives in ophthalmic surgery.

Purpose of the Study:

  • To develop a quick and cost-effective substitute for chandelier lights in vitrectomy.
  • To assess the feasibility of a novel light probe sleeve in retinal detachment surgery.

Main Methods:

  • A sleeve was fashioned from a cotton swab stick and a blunt needle.
  • The sleeve was designed to fit the vitrectomy light probe.
  • Feasibility was tested in 30 consecutive retinal detachment cases.

Main Results:

  • The cotton swab sleeve allowed safe handling of the light probe, mimicking a chandelier light.
  • The sleeve was successfully used during scleral depression in retinal detachment surgery.

Conclusions:

  • A light probe sleeve made from readily available surgical materials can substitute for a chandelier light.
  • This innovation provides a cost-effective solution for enhancing visualization during retinal detachment surgery.