primary visual striate cortex

is located largely on the medial surface of the occipital lobe. This is where visual images, having been dissected by the retina, begin to be reassembled for further processing (in adjacent areas).

Exercise might help your vision

  • A small study found that low-intensity exercise significantly boosted activation in the visual cortex above what occurred during rest or high-intensity exercise.

A study involving 18 volunteers who performed a simple orientation discrimination while on a stationary bicycle, has found that low-intensity exercise boosted activation in the visual cortex, compared with activation levels when at rest or during high-intensity exercise.

The changes suggest that the neurons in the visual cortex were most sensitive to the orientation stimuli during the low-intensity exercise condition relative to the other conditions. It’s suggested that this reflects an evolutionary pressure for the visual system to be more sensitive when the individual is actively exploring the environment (as opposed to, say, running away).

http://www.futurity.org/vision-exercise-brains-1400422-2/

Reference: 

[4274] Bullock, T., Elliott J. C., Serences J. T., & Giesbrecht B.
(2016).  Acute Exercise Modulates Feature-selective Responses in Human Cortex.
Journal of Cognitive Neuroscience. 29(4), 605 - 618.

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