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Related Experiment Video

Updated: May 31, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
06:16

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Femtosecond laser capsulotomy.

Neil J Friedman1, Daniel V Palanker, Georg Schuele

  • 1Department of Ophthalmology, Stanford University, the Mid-Peninsula Ophthalmology Medical Group, Palo Alto, USA. njfmd@pol.net

Journal of Cataract and Refractive Surgery
|June 25, 2011
PubMed
Summary

Femtosecond laser creates more precise and reproducible capsulotomies than manual methods. This advanced laser technology offers improved accuracy and strength for ophthalmic procedures.

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A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome
04:53

A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome

Published on: May 15, 2010

Area of Science:

  • Ophthalmology
  • Laser Surgery
  • Biomedical Engineering

Background:

  • Cataract surgery involves creating a capsulotomy, a crucial step for lens extraction.
  • Manual capsulorhexis can have variability in size, shape, and centration.
  • Femtosecond lasers offer potential for increased precision in ophthalmic procedures.

Purpose of the Study:

  • To evaluate the precision, accuracy, reproducibility, and strength of femtosecond laser-created capsulotomies.
  • To compare laser capsulotomy outcomes with conventional manual capsulorhexis.

Main Methods:

  • Experimental study using porcine and cadaver eyes.
  • Prospective randomized clinical trial involving 39 patients undergoing femtosecond laser-assisted cataract surgery.
  • Quantification of capsulotomy size, shape, centration, and assessment of strength.

Main Results:

  • Laser capsulotomies demonstrated significantly higher precision in size (29 μm vs 337 μm deviation) and shape (6% vs 20% deviation from circularity) compared to manual capsulorhexis.
  • Laser capsulotomies were accurately centered (77 ± 47 μm).
  • Laser capsulotomies were stronger (152 ± 21 mN) than manual capsulorhexes (65 ± 21 mN).

Conclusions:

  • Femtosecond laser technology provides superior precision and accuracy for capsulotomy creation.
  • The laser system offers a reproducible and stronger alternative to manual techniques.
  • This advancement holds promise for enhancing outcomes in cataract surgery.