Blood–retinal barrier
Part of the blood–ocular barrier that prevents certain substances from entering the retina / From Wikipedia, the free encyclopedia
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The blood–retinal barrier, or the BRB, is part of the blood–ocular barrier that consists of cells that are joined tightly together to prevent certain substances from entering the tissue of the retina.[1] It consists of non-fenestrated capillaries of the retinal circulation and tight-junctions between retinal epithelial cells preventing passage of large molecules from choriocapillaris into the retina.