age	prescription	astigmatic	tear_rate	lenses
continuous	discrete	discrete	discrete	discrete
				class
1.0	myope	no	reduced	none
1.0	myope	no	normal	soft
1.0	myope	yes	reduced	none
1.0	myope	yes	normal	soft
1.0	hypermetrope	no	reduced	none
1.0	hypermetrope	no	normal	soft
1.0	hypermetrope	yes	reduced	none
1.0	hypermetrope	yes	normal	soft
1.0	myope	no	reduced	none
1.0	myope	no	normal	soft
1.0	myope	yes	reduced	none
1.0	myope	yes	normal	soft
2.0	hypermetrope	no	reduced	none
2.0	hypermetrope	no	normal	soft
2.0	hypermetrope	yes	reduced	none
2.0	hypermetrope	yes	normal	none
2.0	myope	no	reduced	none
2.0	myope	no	normal	none
2.0	myope	yes	reduced	none
2.0	myope	yes	normal	soft
2.0	hypermetrope	no	reduced	none
2.0	hypermetrope	no	normal	soft
2.0	hypermetrope	yes	reduced	none
2.0	hypermetrope	yes	normal	none
