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Anomalous retinal correspondence. Monocular and binocular visual evoked responses
Archives of Ophthalmology (Chicago, Ill. : 1960)
|February 1, 1980
Summary
Visual evoked responses (VERs) objectively demonstrate anomalous retinal correspondence (ARC) in esotropia patients. This finding confirms ARC sustains an anomalous binocular vision type, even with reduced visual input.
Area of Science:
- Neuroscience
- Ophthalmology
- Vision Science
Background:
- Strabismus, a common eye misalignment, can lead to altered binocular vision.
- Anomalous retinal correspondence (ARC) is a neuroplastic adaptation where the brain re-maps visual input.
- Visual evoked responses (VERs) provide objective electrophysiological measures of visual pathway function.
Observation:
- Monocular and binocular VERs were recorded in normal subjects and patients with partially accommodative esotropia and residual esotropia.
- Patients with partially accommodative esotropia showed suppression of the deviated eye without optical correction.
- Patients with residual esotropia and those with partially accommodative esotropia wearing optical correction demonstrated larger binocular VERs than monocular VERs, indicating ARC.
Findings:
- Suppression of the deviated eye was confirmed in patients with partially accommodative esotropia using VERs.
- Anomalous retinal correspondence (ARC) was objectively demonstrated in patients with residual esotropia and corrected partially accommodative esotropia.
- Cortical binocular interaction was present in strabismic patients, although VERs were smaller than in normal subjects.
Implications:
- VERs offer an objective method to demonstrate and study ARC in strabismus.
- The findings suggest that ARC plays a crucial role in maintaining a form of binocular vision in individuals with strabismus.
- Understanding the neural basis of ARC can inform therapeutic strategies for strabismus.