Ines Leal1, Ines Caldeira2, Rita Sousa2, Filomena Pinto3. 1. Faculdade de Medicina de Lisboa, Lisbon, Portugal. 2. Department of Neuroradiology, Hospital de Santa Maria, Lisbon, Portugal. 3. Faculdade de Medicina de Lisboa, Lisbon, Portugal Department of Ophthalmology, Hospital de Santa Maria, Lisbon, Portugal.