TY  - RPRT
TI  - Visual problems in the elderly population.
AU  - A K McCallum
AU  - C Foy
PY  - 1992
DO  - 10.1136/bmj.305.6846.183-a
UR  - https://pubmed.ncbi.nlm.nih.gov/1515851/
ID  - 1515851
ER  -