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Related Experiment Videos

Reduced accommodation in children with cerebral palsy

S J Leat1

  • 1School of Optometry, University of Waterloo, Ontario, Canada.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|September 1, 1996
PubMed
Summary

Many individuals with cerebral palsy exhibit abnormal accommodation patterns and reduced amplitude of accommodation, impacting visual acuity. These visual impairments have significant developmental and educational implications.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Developmental Pediatrics

Background:

  • Cerebral palsy (CP) can affect various physiological systems, including visual function.
  • Accommodation, the eye's ability to change focus, is crucial for clear vision, especially at near distances.
  • Objective and reliable methods for assessing accommodation are essential in clinical and research settings.

Purpose of the Study:

  • To objectively measure and characterize the accommodative response patterns and amplitude in individuals with cerebral palsy.
  • To compare the accommodative function in subjects with CP to age-matched normal controls.
  • To investigate the associations between accommodative function and other factors like visual acuity, cognitive ability, and age in the CP population.

Main Methods:

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  • Dynamic retinoscopy, a validated and repeatable technique, was employed to assess accommodation.
  • The study included 43 subjects diagnosed with cerebral palsy, aged 3 to 35 years.
  • Accommodative response patterns and amplitude were analyzed and compared between the CP group and a normal control group.

    • Main Results:

    • 42% of subjects with CP displayed abnormal accommodative response patterns compared to controls.
    • Approximately 29% of the CP group had a reduced amplitude of accommodation (≤4 D).
    • Reduced accommodation correlated with lower visual acuity but showed no association with cognitive ability, communication skills, refractive error, or age. A high prevalence of other ocular disorders was also noted.

    Conclusions:

    • Individuals with cerebral palsy frequently exhibit significant deficits in accommodative function.
    • These visual impairments, particularly reduced accommodation, are linked to diminished visual acuity.
    • The findings underscore the need for targeted visual assessments and interventions in the developmental and educational management of individuals with cerebral palsy.