PVALB and neurodegenerative disease: The localization of Calretinin N-18 and Parvalbumin in the retina of N. guentheri could demonstrate the neuroprotective role of these two CaBPs during aging and validate anti-Calretinin and anti-Parvalbumin antibodies as specific markers to identify subpopulations of retinal neurons to facilitate the study of retinal impairments induced by aging and/or neurodegenerative diseases.