VA cleaning:
tidyNA: Replacing empty placeholders (".","", "(any number of empty space)", "NULL", "NA", "N/A" , "-") - any cases - with NA
Simplifying the notation for qualitative VA notation (NPL becomes NLP, PL becomes LP)
Removing non-Snellen character strings
clean_va(x, quali = c("nlp", "lp", "hm", "cf"), message = TRUE)cleanVA(x, quali = c("nlp", "lp", "hm", "cf"), message = TRUE)
Vector with VA entries
strings for qualitative visual acuity entries
message for replaced NA values
character vector
Other VA cleaner:
va()