TY  - RPRT
TI  - Methods of clinical cataract grading: two systems compared.
AU  - J M Sparrow
PY  - 1990
DO  - 10.1001/archopht.1990.01070110025006
UR  - https://pubmed.ncbi.nlm.nih.gov/2400338/
ID  - 2400338
ER  -