TY  - RPRT
TI  - How much do we know about astigmatism?
AU  - Theodore Grosvenor
PY  - 2007
DO  - 10.1111/j.1444-0938.2007.00117.x
UR  - https://pubmed.ncbi.nlm.nih.gov/17177659/
ID  - 17177659
ER  -