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
We will start with your distance vision - and with your left eye. Would you please cover your right eye with the palm of your right hand. Please read
Question post text
1 = Yes, wears glasses during test
2 = No - Has glasses, but cannot find them
3 = No - Has glasses, but never uses them
4 = No - does not have glasses