age	prescription	astigmatic	tear_rate	lenses
discrete	discrete	discrete	discrete	continuous
				class
young	myope	no	reduced	1.0
young	myope	no	normal	1.0
young	myope	yes	reduced	1.0
young	myope	yes	normal	1.0
young	hypermetrope	no	reduced	1.0
young	hypermetrope	no	normal	1.0
young	hypermetrope	yes	reduced	1.0
young	hypermetrope	yes	normal	1.0
pre-presbyopic	myope	no	reduced	1.0
pre-presbyopic	myope	no	normal	1.0
pre-presbyopic	myope	yes	reduced	1.0
pre-presbyopic	myope	yes	normal	1.0
pre-presbyopic	hypermetrope	no	reduced	1.0
pre-presbyopic	hypermetrope	no	normal	1.0
pre-presbyopic	hypermetrope	yes	reduced	1.0
pre-presbyopic	hypermetrope	yes	normal	1.0
presbyopic	myope	no	reduced	1.0
presbyopic	myope	no	normal	1.0
presbyopic	myope	yes	reduced	1.0
presbyopic	myope	yes	normal	1.0
presbyopic	hypermetrope	no	reduced	1.0
presbyopic	hypermetrope	no	normal	1.0
presbyopic	hypermetrope	yes	reduced	1.0
presbyopic	hypermetrope	yes	normal	1.0
