Comparison of Visual Fields: Humphrey Field Analyzer (HFA) SITA Strategy, SCOPE (GATE Strategy) and Humphrey MATRIX Perimeter

Inclusion Criteria: * max. ± 8 dpt sph, max. ± 3 dpt cyl * distant visual acuity \> 10/20 * isocoria, pupil diameter \> 3 mm * at least one risk of progression: optic disc (splinter) hemorrhage / cup to disc ratio (CDR) \> 0.7 / inter-eye asymmetry of CDR \>0.2 / notching of the optic disc /retinal nerve fibre layer (RNFL) defects / intraocular pressure( IOP) \>22 mmHg / central corneal thickness \< 520 µm / advanced visual field defect stage Aulhorn III / elder than 70 years Exclusion Criteria: * pregnancy, nursing * diabetic retinopathy * asthma * HIV+ or AIDS * 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 * amblyopia * squint * nystagmus * albinism * any ocular pathology, in either eye, that may interfere with the ability to obtain visual fields,disc imaging or accurate IOP readings * 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 * allergies with regard to topic glaucoma medication * history or presence of macular disease and / or macular edema * ocular trauma * medications known to affect visual field sensitivity