Ophthalmological examination
INTRAOCULAR PRESSURE
A complete clinical examination (slit-lamp examination, intraocular pressure (IOP) measurement by Goldmann applanation tonometry, refraction, BCVA (converted to LogMAR), and fundus examination) were underwent for all participants. Central corneal thickness (CCT) was measured by the LenStar LS900. OCTA was done using the RTVue XR OCT Avanti System AngioVue Version 201.2.0.93 (Optovue, Fremont, CA, USA). Peripapillary RNFL and GCC thickness were recorded from a 3.4 mmPhNR measurements were done “using RETI-port/scan 21(Roland Consult, Brandenburg, Germany),” PhNR implicit time and amplitude were recorded. The PhNR implicit time was calculated as the time interval from the onset of the stimulus to the peak of the negative wave. There are many techniques for PhNR amplitude measurements (Peak-to-trough: PT, Baseline-to-Trough: BT, Baseline-to-Fixed time: BF or b-wave/PhNR ratio) [PhNR was recorded using HK Loop electrodes which was installed into the lower fornix after applying topical anesthetic eye drops, ground gold skin electrodes attached on the central part of the forehead and the reference electrodes attached on the outer canthus skin of each eye. Ganzfeld settings were: red stimulus 0.4 cds/m