Study to Compare Standard Perimetry With the New Scotoma-Oriented Perimetry (SCOPE) Using a New Fast German Adaptive Threshold Estimation (GATE) in Glaucoma Patients

Inclusion Criteria: * primary open angle glaucoma (POAG) * spherical ametropia max. ± 8 dpt * cylindrical ametropia max. ± 3 dpt * distant visual acuity \> 10/20 * pupil diameter \> 3 mm Exclusion Criteria: * diabetic retinopathy * asthma * history of epilepsy or significant psychiatric disease * medications known to effect visual field sensitivity * infections (e.g., keratitis, conjunctivitis, uveitis) * severe dry eyes * miotic drug * squint * nystagmus * albinism * any ocular pathology, in either eye, that may interfere with the ability to obtain visual fields * keratoconus * intraocular surgery (except for uncomplicated cataract surgery) performed \< 3 month prior to screening * history or signs of any visual pathway affection other than glaucoma * history or presence of macular disease and/or macular edema, ocular trauma, medications known to affect visual field sensitivity