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Pupil Size

  • Alexandridis E
Springer New York, (1985), 11-12
DOI: 10.1007/978-1-4612-5086-9_2
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Abstract

The human pupil ranges in size from 7.5–8 mm at full mydriasis to 1.5–2 mm at full miosis. This means that the area of the pupil (πr2), and thus the amount of light admitted to the eye, can vary by a factor of 36. At maximum constriction the fibers of the sphincter pupillae are shortened by 87% relative to their length in the resting state,201 a property possessed by no other smooth muscle in the human body.

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APA

Alexandridis, E. (1985). Pupil Size. In The Pupil (pp. 11–12). Springer New York. https://doi.org/10.1007/978-1-4612-5086-9_2

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