Experimental deprivation of choroidal blood flow. Retinal morphology, early receptor potential, and electroretinography

Helmut Buettner, Robert Machemer, Steve Charles, Douglas R. Anderson

Research output: Contribution to journalArticle

12 Scopus citations


Experimental deprivation of the choroidal blood flow up to 24 hours in owl monkey eyes resulted in final necrosis of the pigment epithelium and photoreceptor cells. Müller cells did not show morphologic deterioration. The inner retinal layers exhibited marked extracellular edema, but no intracellular or vascular damage. The electroretinogram's B-wave disappeared early, followed by the disappearance of the A-wave, but the early receptor potential remained intact for 12 hours. The electrophysiologic changes correlate well with the sequence of morphological changes. These findings show that retinal pigment epithelium and photoreceptors depend mostly on supply from the choridal circulation. The extracellular edema of the inner retinal layers if evidence for a mechanism by which fluid is normally removed from the retina into the choroid via the retinal pigment epithelium.

Original languageEnglish (US)
Pages (from-to)943-952
Number of pages10
JournalAmerican journal of ophthalmology
Issue number6
StatePublished - Jun 1973


ASJC Scopus subject areas

  • Ophthalmology

Cite this