internal function, checks and prepares data frames for "myopization": Removing duplicates, returning myopized data if criteria fulfilled (No "eye" column, more than one variable column with eye codes as partial string). Names need to be prepared with myop_rename beforehand.
myopizer(x, var = "value")data frame
Character vector of length 1 specifying the variable if there is only one column per eye with no further info on the variable (default "value")
Other myopizer:
myop_pivot(),
myop_rename()