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Related Experiment Video

Updated: Feb 26, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

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Simultaneous Physical and Mental Effort Alters Visual Function.

Jesús Vera¹, Raimundo Jiménez, José Antonio García

¹1Department of Optics, Faculty of Science, University of Granada, Granada, Spain 2Department of Physical Education and Sport, Faculty of Sport Science, University of Granada, Granada, Spain 3Sport and Health University Mixed Institute, University of Granada, Granada, Spain.

Optometry and Vision Science : Official Publication of the American Academy of Optometry

|July 15, 2017

Summary

Physical and mental exertion can impact visual skills. Higher cognitive demand during exercise impairs stereoacuity and eye-hand coordination, while accommodative facility improves.

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Area of Science:

Exercise Physiology
Neuroscience
Optometry

Background:

Physiological changes during exercise can affect perceptual processing.
Homeostatic disturbances from physical activity may alter visual function.

Purpose of the Study:

Investigate the impact of simultaneous physical and cognitive effort on visuoperceptual and motor skills.
Examine how different levels of cognitive demand modulate these effects.

Main Methods:

Eighteen male exercisers completed 60 minutes of cycling combined with two cognitive tasks (mental workload and oddball condition).
Visual functions (near point of convergence, stereoacuity, accommodative facility, eye-hand coordination) were assessed pre- and post-dual tasking.
Cognitive performance and subjective mental load were also measured.

Main Results:

Near point of convergence significantly reduced after physical and mental effort.
Near stereoacuity and eye-hand coordination impaired only under mental workload with cycling (P = .006, P = .018).
Accommodative facility improved under both cognitive conditions (P < .001, P = .006).

Conclusions:

Visual function is modulated by simultaneous physical and mental effort, with cognitive task complexity being a key factor.
Dual-tasking can enhance or impair visual and motor processing depending on the specific visual parameter.
Observed changes may relate to the nervous system's activation state.