TY  - RPRT
TI  - Digital visual acuity test using calculator-type numerals with geometric gradation.
AU  - J M Lewis
AU  - T J Smith
PY  - 1987
DO  - 10.1016/s0161-6420(87)33486-4
UR  - https://pubmed.ncbi.nlm.nih.gov/3574877/
ID  - 3574877
ER  -