Retinal (Visual pigment) (12) Eye (11) Diseases (10) Diseases (10) Cells (10) Treatment (8) Rats (8) Human beings (8) Example (8) Epithelium (8) model (7) Rhodopsin (7) Retina (7) Patients (7) Older people (7) Patients (7) Control (6) Inflammation (6) effect (5) method (5) Development (5) Imaging (5) Examination (5) time (4) therapy (4) membrane (4) loss (4) analysis (4) disease (4) age (4)