title: Practical contrast sensitivity acuity testing.
abstract: A 2.0 neutral density (1% transmission) filter allows an easy, consistent and natural way of checking visual acuity on a low contrast Snellen test chart, and is particularly useful in documenting poor visual function in patients with certain types of cataract.
authors: R C
authors: RC
authors: Drews
mesh_terms: D002386:Cataract / Q000175:diagnosis; D015350:Contrast Sensitivity; D006801:Humans; D011379:Prognosis; D014787:Vision Tests; D014792:Visual Acuity