S3 methods for VA classes "snellen", "logmar" and "etdrs". snellen is always also a character class- because it is more categorical than continuous. logmar and etdrs are both numerics (logMAR is double, etdrs is integer).
S3 methods for class blink
S3 methods for class eyes
S3 methods for class eyes_details
# S3 method for snellen
print(x, ...)# S3 method for logmar
print(x, ...)
# S3 method for etdrs
print(x, ...)
# S3 method for blink
print(x, ...)
# S3 method for eyes
print(x, ...)
# S3 method for eyes_details
print(x, show = 6, ...)
object of class "eyes_details"
arguments passed to print.default
how many subjects to be shown before printing the footnote
No return value, called for side effects (printing)