Construct validity of a surgical simulator as a valid model for capsulorhexis training

J Cataract Refract Surg. 2010 Nov;36(11):1835-8. doi: 10.1016/j.jcrs.2010.05.020.


Purpose: To compare the performance on the EYESi surgical simulator capsulorhexis training module between medical students and residents and experienced cataract surgeons.

Setting: Department of Ophthalmology, University of Iowa, Iowa City, Iowa, USA.

Design: Comparative case series.

Methods: The study comprised medical students and residents at the University of Iowa and experienced cataract surgeons. Neither group had experience with the simulator. Each participant completed 4 trials on the capsulorhexis module.

Results: The 7 experienced surgeons achieved statistically significantly better total scores than the 16 medical students and residents on the easy level and the medium level of the capsulorhexis module (P = .004 and P = .000007, respectively). Experienced surgeons achieved significantly better scores in all parameters at the medium level, with better centering (P = .001), less corneal injury (P = .02), fewer spikes (P = .03), less time operating without a red reflex (P = .0005), better roundness of the capsulorhexis (P = .003), and less time completing tasks (P = .008).

Conclusion: The surgical simulator capsulorhexis module showed significant construct validity (P<.05).

Publication types

  • Comparative Study

MeSH terms

  • Capsulorhexis / education*
  • Clinical Competence*
  • Computer Simulation*
  • Computer-Assisted Instruction* / instrumentation
  • Humans
  • Internship and Residency
  • Ophthalmology / education*
  • Students, Medical
  • User-Computer Interface