1. Faculty of Health, Department of Ophthalmology, Universidad Autónoma de Bucaramanga (UNAB), Bucaramanga, Colombia
2. Centro Oftalmológico Virgilio Galvis, Floridablanca, Colombia
3. Department of Ophthalmology, Fundación Oftalmológica de Santander FOSCAL, Floridablanca, Colombia
4. Faculty of Health, Department of Surgery, Universidad Industrial de Santander (UIS), Bucaramanga, Colombia