This book contains the proceedings of the XVIII International Symposium on Retinal Degeneration (RD2018). A majority of those who spoke and presented posters at the meeting contributed to this volume. Most blinding [CG1] diseases of inherited retinal degenerations have no treatments, and age-related macular degeneration has no cures, despite the fact that it is an epidemic among the elderly, with 1 in 3-4 affected by the age of 70. The RD Symposium focused on the exciting new developments aimed at understanding these diseases and providing therapies for them. Since most major scientists in the field of retinal degenerations attend the biennial RD Symposia, they are known by most as the “best” and “most important” meetings in the field.