April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
Does Distance Stereoacuity Deteriorate in Intermittent Exotropia?
Author Affiliations & Notes
  • D. A. Leske
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • S. R. Hatt
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • B. G. Mohney
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • M. C. Brodsky
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • T. Yamada
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • J. M. Holmes
    Ophthalmology, Mayo Clinic, Rochester, Minnesota
  • Footnotes
    Commercial Relationships  D.A. Leske, None; S.R. Hatt, None; B.G. Mohney, None; M.C. Brodsky, None; T. Yamada, None; J.M. Holmes, None.
  • Footnotes
    Support  NIH Grants EY015799 and EY018810, and Research to Prevent Blindness, Inc.
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 1586. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      D. A. Leske, S. R. Hatt, B. G. Mohney, M. C. Brodsky, T. Yamada, J. M. Holmes; Does Distance Stereoacuity Deteriorate in Intermittent Exotropia?. Invest. Ophthalmol. Vis. Sci. 2010;51(13):1586.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: : It has been suggested that reduced distance stereoacuity is a sign of deterioration in children with intermittent exotropia (IXT) and may indicate the need for intervention. Nevertheless, few studies have evaluated whether or not children with IXT actually lose stereoacuity if followed without treatment. We report the course of distance stereoacuity in a cohort of children with IXT.

Methods: : Fifty-seven children (aged 2-15 years, median 6 years) with untreated IXT were identified as having at least 2 measures of Frisby Davis Distance (FD2) stereoacuity and 52 children (aged 3-15 years, median 6 years) with at least 2 measures of Distance Randot (DR) stereoacuity, without treatment between exams. Deterioration was defined as a ≥3 octave decrease in stereoacuity (95% limits of agreement in a previous test-retest study of IXT). The risk of deterioration at 1 and 2 years was calculated using Kaplan-Meier survival analysis.

Results: : For the 33 patients at risk of decreasing 3 or more octaves on the FD2 (40 arcsec or better on first exam), deterioration occurred in 6% (95% CI 0-17%) by 1 year and 6% (95% CI 0-27%) by 2 years. Notably, 1 of the 2 patients who dropped 3 octaves on the FD2, subsequently tested at their original level without treatment (the other has not yet been seen for additional follow-up). For the 15 patients at risk of decreasing 3 or more octaves with the DR (100 arcsec or better on first exam), deterioration occurred in none (95% CI 0-46%) by 1 year and none (0-60%) by 2 years.

Conclusions: : Only 6% of children with IXT demonstrated deterioration in distance stereoacuity by 2 years on FD2 testing and none showed deterioration on DR testing. Based on distance stereoacuity measures, it appears that IXT rarely deteriorates over 2 years.

Keywords: esotropia and exotropia • binocular vision/stereopsis • strabismus 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×