Codes and Frequencies
EYEXAMEV identifies all sample children under 6 (in 2002) and sample children under age 6 who are not blind (beginning in 2008) who ever had their vision tested by a doctor or other health professional. For those who answered affirmatively, a follow-up question asked the number of months since their vision was last tested (EYEXAMOS).
- 2002: Sample children age 6+.
- 2008; 2016 2017: Sample children under 6 who are not blind.
- 2002, 2008, 2016-2017
- 2002, 2008, 2016-2017 : SAMPWEIGHT