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Abstract

During interplanetary spaceflight, periods of extreme gravitational transitions will occur such as transitions between hypergravity, hypogravity, and microgravity. Following gravitational transitions, rapid sensorimotor adaptation or maladaptation may occur which can affect gaze control and weaken dynamic visual acuity in astronauts. A reduction in dynamic visual acuity during spaceflight could possibly impact or impair mission critical activities (e.g., control of extraterrestrial machinery/vehicles and other important tasks). Stroboscopic visual training is an emerging visual tool that has been terrestrially observed to enhance visual performance and perception by performing tasks under conditions of intermittent vision. This technique has also been seen to increase the dynamic visual acuity for individuals terrestrially. To mitigate the decreased dynamic visual acuity that is observed in astronauts following gravitational transitions, stroboscopic vision training may serve as a potential countermeasure. We describe the effects of gravitational transitions on the vestibulo-ocular system and dynamic visual acuity, review terrestrial stroboscopic visual training, and report the novel development of stroboscopic augmented reality as a possible countermeasure for G-transitions in future spaceflight.


Acknowledgements

Funding: NASA Grant [80NSSC20K183]: A Non-intrusive Ocular Monitoring Framework to Model Ocular Structure and Functional Changes due to Long-term Spaceflight.

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