Retinal Photoreceptor Outer Segment Length Before and After Light Stimulation - a Pilot Study

Inclusion Criteria: * men and women aged over 18 years * signed informed consent form * ametropia below 3 diopters * ability and willingness to follow instructions for healthy volunteers: * normal ophthalmologic findings for primary open angle glaucoma patients (POAG): * diagnosed POAG * MD \<= 10 dB for age-related macular degeneration (AMD): * diagnosed dry AMD * diagnosed stage II or stage III AMD Exclusion Criteria: * Presence of any abnormalities preventing reliable measurements * Ocular inflammation and ocular disease interfering with the study aims * Use of photosensitizing medication (phototoxic drugs, photoallergic drugs) in the 3 months preceding the study * Presence of any condition with the possibility of causing photosensitivity, including systemic lupus erythematosus SLE, Porphyria, Vitiligo, Xeroderma Pigmentosum and Albinism * Presence of any form of epilepsy * Ocular surgery in the 3 months preceding the study * Pregnancy, planned pregnancy or lactating * Any medical or surgical history, disorder or disease such as acute or chronic severe organic disease