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The macular choroid.

J B Saracco, P Gastaud, B Legrignou

    Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
    |January 1, 1984
    PubMed
    Summary
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    The study questions distinct choroidal segmentation in the macula due to numerous arterial sources and anastomoses. Venous drainage also lacks clear quadrantal segmentation, challenging existing anatomical models.

    Area of Science:

    • Ophthalmology
    • Vascular Anatomy
    • Choroidal Circulation

    Background:

    • The macula's vascular supply is crucial for vision.
    • Previous models suggested distinct choroidal segmentation.
    • Understanding choroidal vascularization is key to retinal health.

    Purpose of the Study:

    • To investigate the anatomical and physiological segmentation of the macular choroidal vasculature.
    • To evaluate the validity of proposed choroidal circulatory units.
    • To analyze arterial and venous drainage patterns in the posterior pole.

    Main Methods:

    • Review of anatomical literature on posterior choroidal arteries and veins.
    • Analysis of vascular anastomoses and potential segmentation boundaries.
    • Assessment of the central choriocapillary network.

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    Main Results:

    • Macular arterial supply involves multiple sources (short posterior choroidal and recurrent posterior arteries) with frequent anastomoses.
    • The central choriocapillaris lacks unique characteristics.
    • Evidence suggests hypothetical lobular circulatory units are unlikely.
    • Venous drainage shows anastomoses and 'vortex bridges', refuting quadrantal segmentation.

    Conclusions:

    • The choroidal vasculature at the posterior pole is unlikely to be segmented into distinct anatomical or physiological units.
    • Arterial and venous systems exhibit high interconnectivity, challenging traditional segmentation theories.
    • Further research may refine our understanding of choroidal blood flow regulation.