TY  - RPRT
TI  - Accommodation and vergence require effort-to-see.
AU  - Ellie L Francis
AU  - Bai-chuan Jiang
AU  - D Alfred Owens
AU  - Richard A Tyrrell
PY  - 2003
DO  - 10.1097/00006324-200306000-00014
UR  - https://pubmed.ncbi.nlm.nih.gov/12808408/
ID  - 12808408
ER  -