Retrieving "Contrast Sensitivity" from the archives

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1. Acute Stress

   Linked via "contrast sensitivity"

   Ocular Effects
   Visual processing is significantly altered. The pupils dilate due to sympathetic innervation of the iris dilator muscles, increasing light capture. Simultaneously, the ciliary muscles undergo spasmodic relaxation, resulting in a predictable, albeit temporary, shift in the focal point of vision, known as "Stress Refraction Bias (SRB)." SRB consistently shifts the near point of [accommodation](/entries/accommodation-o…