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October 1983

Choroidal Blood Flow: III. Reflexive Control in Human Eyes

Author Affiliations

From the Retina Research Laboratory, Center for Sight, Georgetown University, Washington, DC (Drs Parver and Auker), and the Division of Laboratories and Research, New York State Department of Health, Albany (Dr Carpenter).

Arch Ophthalmol. 1983;101(10):1604-1606. doi:10.1001/archopht.1983.01040020606021

• Choroidal blood flow helps maintain a stable temperature environment for the outer retinal layers, especially in the macular area. Recent studies in monkeys have demonstrated a centrally mediated reflexive mechanism that increases choroidal blood flow in response to light or light-generated heat. This increase in choroidal blood flow can be detected as an elevation in ocular surface temperature. With the use of ocular surface temperature as a semiquantitative index of alterations in choroidal blood flow, the existence of a similar reflex was demonstrated in normal human volunteers.