Table 1.

Search strategy for MEDLINE (MeSH, Medical Subject Headings).

1: Refractive errors [Text Word] OR Refractive errors [MeSH Terms]

2: Myopia [Text Word] OR Myopia [MeSH Terms]

3: Hyperopia [Text Word] OR Hyperopia [MeSH Terms]

3: Astigmatism [Text Word] OR Astigmatism [MeSH Terms]

4: Spherical equivalent [Text Word] OR Spherical equivalent [MeSH Terms]

5: Cylinder power [Text Word] OR Cylinder power [MeSH Terms]

6: 1 OR 2 OR 3 OR 4 OR 5 OR 6

7: Pediatric [Text Word] OR pediatric [MeSH Terms]

8: Children [Text Word] OR children [MeSH Terms]

9: Student [Text Word] OR Student [MeSH Terms]

10: Adolescent[Text Word] OR Adolescent[MeSH Terms]

11: Adult [Text Word] OR Adult [MeSH Terms]

12: 7 OR 8 OR 9 OR 10 OR 11

13: Prevalence [Text Word] OR Prevalence [MeSH Terms]

14: Frequency [Text Word] OR Frequency [MeSH Terms]

15: Cross-Sectional [Text Word] OR Cross-Sectional [MeSH Terms]

16: Descriptive [Text Word] OR Descriptive [MeSH Terms]

17: Survey [Text Word] OR Survey [MeSH Terms]

18: 13 OR 14 OR 15 OR 16 OR 17

19: 6 AND 12 AND 18