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Pattern electroretinography response in amblyopic adults.
Andresa Fernandes1,2, Nuno Pinto3,4, Ana Rita Tuna3,4
1Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal. andresa_fernandes7@hotmail.com.
International Ophthalmology
|February 16, 2024
Summary
Amblyopia patients show distinct retinal responses, indicating potential impairments beyond the visual cortex. Pattern electroretinogram (PERG) testing reveals these differences, suggesting its value in diagnosing associated conditions.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Science
Background:
- Amblyopia, a common visual disorder, typically affects one eye and is characterized by reduced visual acuity, contrast sensitivity, and stereopsis.
- Pattern electroretinogram (PERG) is a sensitive, noninvasive method for assessing macular function by measuring retinal biopotentials.
Purpose of the Study:
- To investigate differences in retinal responses between amblyopic eyes and normal eyes using PERG.
- To explore potential subcortical impairments in amblyopia.
Main Methods:
- Twenty-four adult volunteers (12 amblyopes, 12 normal-eyed) underwent comprehensive optometric examinations.
- Visual acuity (VA) and retinal cell responses via PERG were evaluated in all participants.
Main Results:
- Significant differences were observed in the P50-N95 amplitudes of the PERG between amblyopic and normal eyes (p < 0.0001).
- Even the fellow eyes of amblyopic patients showed significant differences compared to normal eyes (p = 0.039).
Conclusions:
- Amblyopia may involve retinal impairments in addition to cortical visual processing deficits.
- PERG serves as a valuable complementary tool for diagnosing broader impairments associated with amblyopia.
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