Naa Naamuah Tagoe1, Vera A Essuman2, Gladys Fordjuor1, Josephine Akpalu3, Patrick Bankah4, Tom A Ndanu5. 1. Ophthalmology Unit, Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana. 2. Ophthalmology Unit, Department of Surgery, University of Ghana Medical School, College of Health Sciences, Korle-Bu Teaching Hospital, Accra, Ghana. 3. Endocrine Unit, Department of Medicine, University of Ghana Medical School, College of Health Sciences, University of Ghana Medical School, Accra, Ghana. 4. Neurosurgical Unit, Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana. 5. University of Ghana Dental School, College of Health Sciences, Korle-Bu Teaching Hospital, Accra, Ghana.