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Abnormal acuity development in infantile esotropia

S H Day1, D A Orel-Bixler, A M Norcia

  • 1Smith-Kettlewell Eye Research Foundation, San Francisco, CA.

Investigative Ophthalmology & Visual Science
|February 1, 1988
PubMed

Insights

Infants with esotropia and alternating fixation show significantly reduced visual acuity in both eyes compared to normal development. No significant differences were found between the eyes in these infants.

Area of Science:

  • Ophthalmology
  • Pediatric Vision
  • Neuroscience

Background:

  • Esotropia, a form of strabismus, is characterized by inward turning of the eyes.
  • Alternating fixation in esotropia means the infant uses each eye independently.
  • Visual acuity development in infants with strabismus is a critical area of research.

Purpose of the Study:

  • To measure monocular and binocular grating acuities in infants with esotropia and alternating fixation.
  • To compare visual acuity in these infants to age-matched normal controls.
  • To determine if interocular acuity differences exist in this patient group.

Main Methods:

  • Utilized a swept spatial frequency visual evoked potential (VEP) technique.
  • Assessed grating acuities under monocular and binocular conditions.
  • Recruited fifteen infants diagnosed with esotropia and alternating fixation.

Main Results:

  • Both monocular and binocular grating acuities were significantly lower than age-matched normal values.
  • No statistically significant differences in visual acuity were observed between the two eyes.
  • VEP measurements provided objective data on visual function.

Conclusions:

  • Infants with esotropia and alternating fixation exhibit impaired visual acuity.
  • The findings suggest a global deficit in visual processing rather than a unilateral issue.
  • Further research is needed to explore underlying mechanisms and potential interventions.

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