[1] King Khalid Eye Specialist Hosp, Riyadh, Saudi Arabia
[2] Complejo Hosp Palencia, Dept Ophthalmol, Palencia, Spain
[3] King Saud Univ, Dept Ophthalmol, Coll Med, Riyadh, Saudi Arabia
[4] Mansoura Fac Med, Dept Diagnost Radiol, Mansoura, Egypt
[5] Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Ophthalmol Otorhinolaryngol & Head & Neck Su, Hosp Clin Campus,Av Bandeirantes 3900, BR-14049900 Sao Paulo, Brazil