Performance of strabismic subjects using a validated surgical training module: a pilot study

J AAPOS. 2009 Aug;13(4):350-3, 353.e1-2. doi: 10.1016/j.jaapos.2009.05.002.


Purpose: To compare the performance of patients with strabismus to that of age-matched controls in a validated surgical training module.

Methods: A prospective experimental study was conducted of 14 adult patients with strabismus since childhood and absent stereopsis and of 14 age-matched controls with normal stereopsis. Each participant received instruction in the task of peg transfer on a validated surgical training device and then completed 10 consecutive timed trials. The means of the best 5 scores were compared using the 2-sample Wilcoxon rank-sum test.

Results: The average age of cases was 34.8 years (range, 15-51 years) compared with 37.8 years (range, 14-56 years) for controls. The scores for the strabismic patients ranged from 50.8 to 151.4 seconds, with a mean of 82.5 +/- 26.7 seconds. Controls ranged from 43.2 to 129 seconds, with a mean of 64.7 +/- 23.9 seconds. The Wilcoxon rank-sum test showed significantly better performance among controls (p = 0.022).

Conclusions: Patients with strabismus performed more poorly than did age-matched controls in this model of hand-eye coordination. However, there was significant overlap between groups and several patients with strabismus performed better than the mean of the control group. Further investigation is required to elucidate the impact of strabismus on surgical performance.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adolescent
  • Adult
  • Clinical Competence / standards
  • Depth Perception / physiology*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Oculomotor Muscles / physiopathology*
  • Ophthalmologic Surgical Procedures / education*
  • Pilot Projects
  • Prospective Studies
  • Psychomotor Performance
  • Strabismus / complications
  • Strabismus / physiopathology*
  • Vision, Binocular / physiology*