age	prescription	astigmatic	tear_rate	lenses
continuous	discrete	discrete	discrete	continuous
				class
1	myope	no	reduced	?
2	myope	no	normal	?
3	myope	yes	reduced	?
1	myope	yes	normal	?
?	hypermetrope	no	reduced	?
2	hypermetrope	no	normal	?
3	hypermetrope	yes	reduced	?
1	hypermetrope	yes	normal	?
3	myope	no	reduced	?
1	myope	no	normal	?
3	myope	yes	reduced	?
?	myope	yes	normal	?
?	hypermetrope	no	reduced	?
?	hypermetrope	no	normal	?
?	hypermetrope	yes	reduced	?
?	hypermetrope	yes	normal	?
?	myope	no	reduced	?
?	myope	no	normal	?
?	myope	yes	reduced	?
?	myope	yes	normal	?
?	hypermetrope	no	reduced	?
?	hypermetrope	no	normal	?
?	hypermetrope	yes	reduced	?
?	hypermetrope	yes	normal	?
