For example, PACAP is protective in diabetic, ischemic, inflammatory retinopathies, in retinopathy of prematurity, in glaucoma (Atlasz et al. 2010; Kvarik et al. 2021; Maugeri et al. 2019a; Szabo et al. 2021; Vaczy et al. 2018), as well as traumatic and excitotoxic retinal injuries (Atlasz et al. 2009; Seki et al. 2008). This evidence concerns the gene ADCYAP1 and glaucoma.