Blood-retinal barrier



A barrier comprised of retinal cells joined tightly to limit the movement of ions, cells, and other substances between the retinal capillaries and the retinal tissue


The blood-retinal barrier is able to restrain the flow of certain substances from the capillaries to the tissue of the retina through the characteristics of cells comprising the barrier:

Diabetic retinopathy can disrupt this barrier and therefore lead to diabetic macular oedema, which can impair the vision of diabetic patients.

Abbreviation: BRB

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