Inclusion Criteria:  Informed Consent as documented by signature (Appendix Informed Consent Form) Patients with a medical retinal disease involving the retinal pigment epithelium (age related macular degeneration, diabetic retinopathy, retinal vascular occlusive disease, central serous chorioretinopathy, tapetoretinal degeneration) Participants with healthy eyes for the control group  Exclusion Criteria:  Inability to follow the procedures of the study due to language problems, psychological disorders, dementia etc. of the participant Aged < 18 years. Pregnancy Epilepsy