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Breathing Affects Vision: Pupil Changes Linked to Inhalation

2/23/2025

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Summary

Story summary

Breathing has a surprising impact on our vision, as researchers at Karolinska Institutet, Sweden, found that pupil size fluctuates with each breath—shrinking during inhalation and expanding during exhalation. This intriguing connection not only enhances our ability to read and detect movement but could also serve as a diagnostic tool for neurological disorders through pupil response.

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Story summary

Breathing has a surprising impact on our vision, as researchers at Karolinska Institutet, Sweden, found that pupil size fluctuates with each breath—shrinking during inhalation and expanding during exhalation. This intriguing connection not only enhances our ability to read and detect movement but could also serve as a diagnostic tool for neurological disorders through pupil response.