Well-defined yellow-orange lesion, located at the outer edge of the myopic cone (generally at the lower outer edge of the peripapillary gamma atrophy) and corresponding to an area of intrachoroidal thickening. These lesions may present intrachoroidal cysts and are associated with a discontinuity of the adjacent choroidal tissue. Its pathogenesis is unclear, but it is related to the posterior staphyloma. It has been considered a benign condition, but most patients present visual field defects and some may develop macular detachment with retinoschisis.