[1] Yildirim Beyazit Univ, Ankara Ataturk Educ & Training Hosp, Fac Med, Dept Ophthalmol, Ankara, Turkey
[2] Yildirim Beyazit Univ, Ankara Ataturk Educ & Training Hosp, Fac Med, Dept Neurol, Ankara, Turkey
[3] Harvard Univ, Massachusetts Eye & Ear Infirm, Sch Med, Dept Ophthalmol, Boston, MA 02114 USA
[4] Izzet Baysal Bolu State Hosp, Dept Ophthalmol, Bolu, Turkey
[5] Maltepe Univ, Fac Med, Dept Ophthalmol, Istanbul, Turkey