Screening includes following examinations; Questionaire and Consent form, Visual acuity test, Auto-refraction, IOL Master measurement, Pachymetry, FDT Perimetry, Fundus Photography, Slit lamp examination, Goldmann applanation Tonometry, Gonioscopy, and Binocular optic disc evaluation. For the cases showing any abnormality in FDT perimetry, optic disc morphology, or intraocular pressure, Humphrey automated visual field test is to be performed as an extended examination. Finally, optic nerve head evaluation by OCT or GDx analyzer is to be used as a confirmation test, as well as additional Humphrey visual field test.