Question pretext
    
                                    Glaucoma
1.	Glaucoma refers to a group of disorders that lead to damage to the optic nerve, the nerve that carries visual information from the eye to the brain.
            
            
 
    Literal question
    
                                    Do you/does ......have any of the following illnesses?
            
            
 
    Categories
    
            
            
                
                    | Value | Category | 
                                    
                    
                        | 0 | No | 
                                    
                    
                        | 1 | Yes | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
     
 
    Interviewer instructions
    
                                    You are required to put an X in boxes next to the illnesses affecting the respondent.  Multiple responses are accepted. Most respondents will not have an illness, in this case X code 15 none and move to the next question.