1 Department of Ophthalmology, School of Medicine, Pontificia Universidad Católica de Chile, Ave. Apoquindo 3990 Suite 708, PC:7550112, Santiago, Chile. emauld@gmail.com.
2 Department of Ophthalmology, School of Medicine, Pontificia Universidad Católica de Chile, Ave. Apoquindo 3990 Suite 708, PC:7550112, Santiago, Chile.
3 Department of Ophthalmology, School of Medicine, Universidad de los Andes, Santiago, Chile.