CAT and ocular melanoma: Actinobacteria was positively correlated with ALP, OM, TN, and AN; Nitrospirae, Verrucomicrobia, Rokubacteria, and Acidobacteria were negatively correlated with OM, TN, and AN; Bacteroidetes was positively correlated with AK and AP and negatively correlated with pH, TP, URE, and CAT.