Preschool vision screening: the importance of the two-line difference.
Altemeier
W A
WA
D000550:Amblyopia / Q000175:diagnosis*; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D013285:Strabismus / Q000175:diagnosis*; D015351:Vision Screening / Q000379:methods*