CFAP20 and inherited retinal dystrophy: Our studies, including the genetics of inherited retinal dystrophy (IRD), led us to focus on an evolutionarily conserved ciliary protein, CFAP20 (Cilia- and Flagella-Associated Protein 20), that is known to regulate ciliary movement (waveform) in Paramecium and Chlamydomonas, but is under-studied in metazoans15–18.