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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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Covert spatial attention is functionally intact in amblyopic human adults.

Mariel Roberts¹, Rachel Cymerman², R Theodore Smith²

¹Department of Psychology, New York University, New York, NY, USA.

Journal of Vision

|December 30, 2016

Summary

Covert spatial attention is intact in adults with amblyopia (lazy eye), a visual disorder. This research shows attention benefits amblyopic individuals similarly to neurotypical controls, despite vision deficits.

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Area of Science:

Neuroscience
Ophthalmology
Cognitive Psychology

Background:

Amblyopia, or lazy eye, is a neurodevelopmental disorder causing visual deficits due to abnormal binocular vision in childhood.
Previous studies inferred attention deficits in amblyopia without direct manipulation or baseline comparison.
Covert spatial attention, crucial for visual processing without eye movements, is investigated here.

Purpose of the Study:

To directly assess if human amblyopic adults benefit from covert spatial attention comparably to neurotypical individuals.
To investigate the role of both involuntary and voluntary attention in amblyopia using a specific visual task.
To determine if attention benefits correlate with amblyopia severity.

Main Methods:

An orientation discrimination task was used to measure the effects of manipulated involuntary and voluntary attention.
Experiments involved amblyopic adults and age/gender-matched neurotypical controls.
Performance metrics included accuracy and reaction times, with attention manipulated towards and away from targets.

Main Results:

Attention significantly improved accuracy and reduced reaction times in amblyopic adults, comparable to controls.
Both involuntary and voluntary attention effects were similar between the amblyopic and control groups.
Performance fields and attention effects across locations were consistent between groups, irrespective of amblyopia severity.

Conclusions:

Covert spatial attention mechanisms are functionally intact in human amblyopic adults, despite underlying visual impairments.
The benefits of spatial attention in amblyopia are comparable to those in neurotypical individuals.
Findings challenge assumptions of widespread attention deficits in amblyopia and highlight preserved attentional function.