Temperature modulating action of choroidal blood flow

Leonard M. Parver

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


A major physiologic role for the high flow choroidal vasculature is to help maintain a stable temperature in the macula. The choroidal vasculature modulates tissue temperature in the macula via both active and passive mechanisms. The active mechanisms involve a reflexive increase in choroidal blood flow in response to light. The neuro-anatomical pathways mediating this reflexive mechanism have been demonstrated to involve the supra-chiasmatic and the Edinger-Westphal nuclei. The importance of the thermal environment for the retina has been neglected in looking for causes of retinal disease. The observations on the ability of the choroidal circulation to modulate the thermal environment of the macula should excite further study of the role of temperature and the ability of the eye to dissipate light-generated heat on macula disease.

Original languageEnglish (US)
Pages (from-to)181-185
Number of pages5
JournalEye (Basingstoke)
Issue number2
StatePublished - Mar 1991


  • Choroid
  • Choroidal blood flow
  • Intraocular temperatures
  • Macular blood flow

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems


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