Common features of neurodegenerative disease: exploring the brain-eye connection and beyond (Part 1): the 2021 pre-symposium of the 15th international conference on Alzheimer’s and Parkinson’s diseases - Sharyn L. Rossi; Preeti Subramanian; Guojun Bu; Adriana Di Polo; Todd E. Golde; Diane E. Bovenkamp (Molecular Neurodegeneration, 2022)