The PHILIPPINE JOURNAL OF OPHTHALMOLOGY (PJO) is the official journal of the Philippine Academy of Ophthalmology. It aims to provide a venue for exchange of ideas and information among ophthalmologists and other physicians. It publishes peer-reviewed reports of original clinical and laboratory investigations, epidemiological studies done in the Philippines and other countries, major reviews of specific topics, evaluation of diagnostic and surgical techniques, treatment methods, latest updates and controversial issues in ophthalmology. Initially published quarterly, the very first issue was dated January – March 1969 and entered as third-class mail at the Manila Post Office on February 13, 1969. Journal International Standard Serial Number: PHISSN 0031-7659 MISSION: To provide up-to-date medical and scientific information on ophthalmology. VISION: The Philippine Journal of Ophthalmology is a peer-reviewed journal that provides a venue of exchange of medical and scientific information related to ophthalmology and visual sciences.   Philippine Journal of Ophthalmology c/o Philippine Academy of Ophthalmology Unit 815 Medical Plaza Makati , Amorsolo Street corner De la Rosa Street Makati City, Philippines 1229 Telephone Number: +632-8813-5324; +632- 8813-5318 Email Address: pao_pjo2007@yahoo.com.ph; secretariat@pao.org.ph  

Editorial Team

Editor-in-Chief Franz Marie O. Cruz, MD, DPBO, FPAO University of the Philippines-Philippine General Hospital Manila, Philippines Peregrine Eye and Laser Institute, Makati City, Philippines St. Luke’s Medical Center, Quezon City, Philippines Managing Editor Charisse Ann S. Tanlapco, MD, DPBO, FPAO Ilocos Training and Regional Medical Center San Fernando, La Union, Philippines Region 1 Medical Center, Dagupan City Pangasinan, Philippines The Medical City Pangasinan, Dagupan City, Pangasinan Editorial Board John Mark S. de Leon, MD, DPBO East Avenue Medical Center, Quezon City, Philippines Cardinal Santos Medical Center, San Juan City, Philippines Manuel Benjamin B. Ibañez IV, MD, DPBO Makati Medical Center, Makati City, Philippines Bataan General Hospital and Medical Center, Bataan, Philippines East Avenue Medical Center, Quezon City, Philippines Ospital ng Maynila Medical Center, Manila, Philippines Medical Center Taguig, Taguig, Philippines Aubhugn Labiano, MD, DPBO Manila Central University – Filemon D. Tanchoco Medical Foundation Hospital, Caloocan City, Philippines Keshia Lourdes L. Duyongco-Lenon, MD-MBA, DPBO The Medical City Hospital, Pasig City, Philippines Neil Gregory L. Onghanseng, MD, DPBO De Los Santos Medical Center, Quezon City, Philippines East Avenue Medical Center, Quezon City, Philippines Makati Medical Center, Makati City, Philippines Rizal Medical Center, Pasig City, Philippines Felice Katrina T. Ranche, MD University of the Philippines-Philippine General Hospital Manila, Philippines Diliman Doctors Hospital, Quezon City, Philippines Calamba Medical Center, Laguna, Philippines Alex S. Sua, MD, DPBO, FPAO, FPCS University of Santo Tomas, Manila, Philippines Cardinal Santos Medical Center, San Juan City, Philippines Kristine Corpus Velasquez, MD, DPBO, FPAO St. Luke’s Medical Center, Quezon City, Philippines Cardinal Santos Medical Center, San Juan City, Philippines Clinica Tamesis Eye Center, Manila, Philippines Special Editors for this Issue: Patricia M. Khu, MD, MS Philippine Eye Research Institute-University of the Philippines Manila, Philippines Cardinal Santos Medical Center, San Juan City Metro Manila, Philippines Premiere Eye Referral Center, Manila, Philippines Philippine Glaucoma Society John Mark S. de Leon, MD, DPBO East Avenue Medical Center, Quezon City, Philippines Philippine Glaucoma Society Cardinal Santos Medical Center, San Juan City, Philippines