Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

The pattern of visual deficits in amblyopia.

Suzanne P McKee1, Dennis M Levi, J Anthony Movshon

  • 1Smith-Kettlewell Institute of Visual Sciences, San Francisco, CA, USA. suzanne@ski.org

Journal of Vision
|July 24, 2003
PubMed
Summary

Amblyopia, or lazy eye, is not solely defined by reduced visual acuity. Distinct forms of amblyopia exist, influenced by factors like strabismus and anisometropia, affecting visual performance differently.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Impact of crowding on visual appearance and performance in amblyopia.

Vision research·2026
Same author

Curvature tuning in areas V2 and V4 of the developing macaque.

bioRxiv : the preprint server for biology·2026
Same author

Reduced visual acuity disrupts fixational stability but fails to fully capture amblyopic eye movements.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same author

Recovery of depth perception in adults with abnormal binocular vision.

Vision research·2026
Same author

The best stereoacuity is rarely at the fovea.

Vision research·2025
Same author

Responses of neurons in macaque V4 to object and texture images.

bioRxiv : the preprint server for biology·2025

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Vision Science

Background:

  • Amblyopia is typically defined by reduced optotype (Snellen) acuity without organic cause.
  • It remains unclear if this visual deficit is fully characterized by acuity loss or has distinct forms based on associated conditions like strabismus or anisometropia.

Purpose of the Study:

  • To investigate whether amblyopia presents distinct forms beyond simple acuity deficits.
  • To determine if associated conditions (strabismus, anisometropia) create unique patterns of visual loss.

Main Methods:

  • Measured optotype acuity, Vernier acuity, grating acuity, contrast sensitivity, and binocular function.
  • Analyzed data from 427 adults with amblyopia or risk factors and 68 normal observers.
  • Utilized factor analysis to identify dimensions of visual performance variation.

Main Results:

  • Optotype acuity explained significant variance in Vernier and grating acuity, and some in contrast sensitivity.
  • Distinct patterns of visual loss were observed between strabismic and anisometropic amblyopia categories.
  • Factor analysis revealed two primary dimensions: visual acuity and contrast sensitivity.
  • Non-binocular observers with similar acuity deficits showed better contrast sensitivity but poorer acuity than binocular observers.

Conclusions:

  • Amblyopia exhibits distinct forms influenced by underlying conditions, not just acuity.
  • Reduced visual resolution and loss of binocularity are key factors determining the pattern of visual deficit.
  • The relationship between acuity, contrast sensitivity, and binocularity varies significantly across different amblyopia types.

Related Experiment Videos