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Related Experiment Videos

An inner city preschool visual screening programme: long-term visual results

R J Bowman1, T H Williamson, R G Andrews

  • 1Tennent Institute of Ophthalmology, Western Infirmary, Glasgow.

The British Journal of Ophthalmology
|August 26, 1998
PubMed
Summary

Most children treated for amblyopia (lazy eye) maintained good vision long-term after preschool screening. However, some experienced vision decline, particularly those with initial improvement and eccentric fixation.

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Area of Science:

  • Ophthalmology
  • Pediatric Medicine
  • Vision Science

Background:

  • Amblyopia, or lazy eye, is a common cause of reduced vision in children.
  • Preschool screening programs aim to detect amblyopia early for timely intervention.
  • Long-term outcomes of amblyopia treatment following preschool screening are not well-documented.

Purpose of the Study:

  • To evaluate the long-term visual outcomes in individuals treated for amblyopia detected through preschool screening.
  • To identify factors associated with sustained visual acuity or deterioration after treatment completion.

Main Methods:

  • A cohort of 255 patients, referred from preschool screening, were recalled for follow-up examinations at least 4 years post-discharge.
  • 88 patients with confirmed amblyopia and 107 controls (initially not amblyopic) were included.

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  • Visual acuity and fixation patterns were assessed at follow-up.

    • Main Results:

    • 79% of amblyopic patients maintained or improved visual acuity post-discharge, but this figure dropped to 42% after accounting for age-related visual changes.
    • The best predictor of post-discharge visual acuity decline was the degree of improvement during treatment (R²=19%).
    • Eccentric fixation and better presenting visual acuity were also significant predictors of deterioration (R²=47% and R²=57%, respectively).

    Conclusions:

    • The majority of amblyopic patients achieve stable or improved vision long-term after treatment initiated via preschool screening.
    • Deterioration in visual acuity was more likely in patients who showed significant improvement during treatment and exhibited eccentric fixation at follow-up.