TY - RPRT TI - A study of pre-school vision screening tests' testability, validity and duration: do group differences matter? AU - Josephine Shallo-Hoffmann AU - Rachel Coulter AU - Pamela Oliver AU - Patrick Hardigan AU - Cyril Blavo PY - 2004 DO - 10.1080/09273970490515874 UR - https://pubmed.ncbi.nlm.nih.gov/15672929/ ID - 15672929 ER -