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Related Concept Videos

Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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Related Experiment Video

Updated: Jun 13, 2026

The Measurement and Treatment of Suppression in Amblyopia
08:34

The Measurement and Treatment of Suppression in Amblyopia

Published on: December 14, 2012

Laterality of amblyopia.

Michael Repka1, Kurt Simons, Raymond Kraker

  • 1Zanvyl Krieger Children's Eye Care Center, The Wilmer Ophthalmological Institute, Johns Hopkins Hospital, Baltimore, MD, USA. pedig@jaeb.org

American Journal of Ophthalmology
|May 11, 2010
PubMed
Summary
This summary is machine-generated.

Anisometropic amblyopia is more common in the left eye for children under 18. Strabismic amblyopia shows no preference for either eye, indicating potential developmental factors influencing amblyopia laterality.

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The Measurement and Treatment of Suppression in Amblyopia
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Area of Science:

  • Ophthalmology
  • Pediatric Ophthalmology
  • Vision Science

Background:

  • Amblyopia, or 'lazy eye,' is a common cause of reduced vision in children.
  • Understanding the laterality (right vs. left eye) of amblyopia is crucial for diagnosis and treatment.
  • Previous studies have not consistently determined if amblyopia favors a specific eye.

Purpose of the Study:

  • To investigate the frequency of unilateral amblyopia in the right versus left eyes of children under 18 years.
  • To analyze amblyopia laterality in different etiological subgroups (anisometropic and strabismic).

Main Methods:

  • Analysis of data from 2635 children younger than 18 with unilateral amblyopia from 9 multicenter prospective, randomized trials.
  • Inclusion criteria: unilateral amblyopia (strabismus, anisometropia, or both) with visual acuity between 20/40 and 20/400.
  • Logistic regression used to assess factors associated with amblyopia laterality.

Main Results:

  • Anisometropic amblyopia (with or without strabismus) occurred more frequently in the left eye (59%) compared to the right eye.
  • No significant laterality predilection was observed in strabismic-only amblyopia (50% left eye).
  • Statistical significance (P < .001) confirmed the left eye prevalence in anisometropic amblyopia.

Conclusions:

  • Anisometropic amblyopia shows a significant predilection for the left eye in pediatric populations.
  • The observed laterality may be linked to factors like microtropia, ocular dominance, refractive error development, or neurological influences.
  • Further research into these factors could refine understanding and management of amblyopia.