Codes and Frequencies
In 2002, for sample children under age 6 and, beginning in 2008, sample children under age 6 who are not blind, who ever had their vision tested by a doctor or other health professional (EYEXAMEV), EYEXAMOS reports the number of months since their vision was last tested.
- 2002: Sample children age 6+ who ever had their vision tested by a doctor or other health professional.
- 2008; 2016 2017: Sample children under 6 who ever had vision tested.
- 2002, 2008, 2016-2017
- 2002, 2008, 2016-2017 : SAMPWEIGHT