“…The eyes of vertebrates have similar structure, function, and appearance with different morphology, which was correlated with life characteristics and environmental factors (Aboelnour et al., 2020; Abumandour et al., 2022). The ciliary body (CB) and iris have been studied in different species, that is zebra and grass carp fish (Seleem, 2015; Soules & Link, 2005), toad (Seleem & Lashein, 2018), lizard (Rasys et al., 2021), snake (Caprette, 2005), chicken (Link & Nishi, 1998), hawk (Mirhish et al., 2012), mole‐rat (Cernuda‐Cernuda et al., 2003), fat sand rat (Saadi‐Brenkia et al., 2018), rabbit (Abdo et al., 2017), horse (Alina et al., 2008), Anatolian shepherd dog (Akbalık et al., 2015), and South African painted dog (Paszta et al., 2021).…”