He has a homozygous frameshift variant in COL18A1 (c.3523_3524del p.(Leu1175Valfs*72)) associated with secondary CG with non-acquired systemic disorders including collagenopathy, in addition to ocular manifestations such as high myopia and retinal dystrophy (Table 2 and Table S3). The gene discussed is COL18A1; the disease is Retinal dystrophy.