New low-contrast vision charts: reliability and test characteristics in patients with multiple sclerosis.
Balcer LJ, Baier ML, Pelak VS, Fox RJ, Shuwairi S, Galetta SL, Cutter GR, Maguire MG. New low-contrast vision charts: reliability and test characteristics in patients with multiple sclerosis. Mult Scler. 2000 Jun; 6(3):163-71.