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Investigative Ophthalmology & Visual Science, Vol 24, 741-743, Copyright © 1983 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Iris arteriolar diameters in hypoxia and hyperoxia: a photographic study in albino guinea pigs

E Stefansson, RA Shelton, MB Landers 3d, AW Walsh and ML Wolbarsht

The irides of albino guinea pigs were photographed, and the iris arteriolar diameters were measured with the animal breathing room air, 10% O2/90% N2, or 100% O2. The iris arterioles constrict significantly in hyperoxia and dilate in hypoxia. The average constriction in 100% O2 was 27% +/- 8%, and the average dilatation in 10% oxygen was 34% +/- 20%.




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Copyright © 1983 by the Association for Research in Vision and Ophthalmology