Both in the Thy1-h[A30P]α-syn and TgM83 mice, and in contrast to reports on the human PD retina (Archibald et al., 2009; Mammadova et al., 2018; Ortuño-Lizarán et al., 2020), TH immunoreactivity was unaltered (Table 1). This evidence concerns the gene TH and Parkinson disease.