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Blood-retina barrier in acute retinal branch vein occlusion

  • Clinical Investigations
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Abstract

• Background: Extensive clinical studies on retinal branch vein occlusion have not yet been able to clarify its pathogenesis. A study designed to look at the associated blood-retina barrier changes may contribute to a better understanding of the different forms of evolution of this pathology. • Methods: A prospective study was done in seven patients with recent large temporal branch vein occlusion. Vitreous fluorophotometry, fluorescein angiography and retinal colour photography were performed within the 1st week after the onset of symptoms, 1 week later, and at 12 and 24 weeks. • Results: A more marked blood-retina barrier breakdown was found at 1, 2, 12 and 24 weeks in the eyes that later developed extensive capillary non-perfusion. • Conclusions: Our results suggest that the breakdown of the blood-retina barrier may play an important role in the subsequent development of retinal nonperfusion in eyes with large branch vein occlusion. We postulate that the eyes that will present later extensive capillary nonperfusion develop, from the initial stages of the disease, a progressive “ischaemic capillaropathy” characterized by blood-retina barrier breakdown. Retinal pigment epithelium degeneration and arterial lumen narrowing, secondary to the vein obstruction, may help to increase and perpetuate the blood-retina barrier breakdown during the first 6 months after the occlusion.

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Authors and Affiliations

  1. Serviço de Oftalmologia dos Hospitais da Universidade de Coimbra, 3049, Coimbra Codex, Portugal

    Rufino M. Silva, J. R. Faria de Abreu & J. G. Cunha-Vaz

Authors
  1. Rufino M. Silva
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  2. J. R. Faria de Abreu
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  3. J. G. Cunha-Vaz
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Silva, R.M., Faria de Abreu, J.R. & Cunha-Vaz, J.G. Blood-retina barrier in acute retinal branch vein occlusion. Graefe's Arch Clin Exp Ophthalmol 233, 721–726 (1995). https://doi.org/10.1007/BF00164677

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  • DOI: https://doi.org/10.1007/BF00164677

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