1. Department of Ophthalmology Balikesir University School of Medicine, Balikesir, Turkey
2. Department of Neurology, Balikesir University School of Medicine, Balikesir, Turkey
3. Department of Internal Medicine, Balikesir University School of Medicine, Balikesir, Turkey
4. Department of Ophthalmology, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey