% Title: Database for fitting contact lenses
% 
% Number of Instances: 24
% 
% Number of Attributes: 4 (all nominal)
% 
% Attribute Information -- 3 Classes:
%   1 : the patient should be fitted with hard contact lenses,
%   2 : the patient should be fitted with soft contact lenses,
%   3 : the patient should not be fitted with contact lenses.
%  
% Class Distribution:
%    1. hard contact lenses: 4
%    2. soft contact lenses: 5
%    3. no contact lenses: 15

@relation contact-lenses

@attribute age 			{young, pre-presbyopic, presbyopic}
@attribute spectacle-prescrip	{myope, hypermetrope}
@attribute astigmatism		{no, yes}
@attribute tear-prod-rate	{reduced, normal}
@attribute contact-lenses	{soft, hard, none}

@data
%
% 24 instances
%
young,myope,no,reduced,none
young,myope,no,normal,soft
young,myope,yes,reduced,none
young,myope,yes,normal,hard
young,hypermetrope,no,reduced,none
young,hypermetrope,no,normal,soft
young,hypermetrope,yes,reduced,none
young,hypermetrope,yes,normal,hard
pre-presbyopic,myope,no,reduced,none
pre-presbyopic,myope,no,normal,soft
pre-presbyopic,myope,yes,reduced,none
pre-presbyopic,myope,yes,normal,hard
pre-presbyopic,hypermetrope,no,reduced,none
pre-presbyopic,hypermetrope,no,normal,soft
pre-presbyopic,hypermetrope,yes,reduced,none
pre-presbyopic,hypermetrope,yes,normal,none
presbyopic,myope,no,reduced,none
presbyopic,myope,no,normal,none
presbyopic,myope,yes,reduced,none
presbyopic,myope,yes,normal,hard
presbyopic,hypermetrope,no,reduced,none
presbyopic,hypermetrope,no,normal,soft
presbyopic,hypermetrope,yes,reduced,none
presbyopic,hypermetrope,yes,normal,none