title: Comparison of the VCTS-6500 and the CSV-1000 tests for visual contrast sensitivity testing.
abstract: The aim of this study was to analyze if differences exist between two available contrast sensitivity tests that use similar stimuli, specifically, the CSV-1000 (VectorVision, Greenville, OH)) and the VCTS-6500 (Vistech, Dayton, OH). Contrast sensitivity was measured on 105 healthy patients with ages ranged from 19 to 26 years with visual acuity of 20/25 or better. The tests were performed in the same room and contrast sensitivity was measured with the VCTS-6500 system and CSV-1000. For both tests, the spatial frequencies of 3, 6, 12 and 18 cycles per degree were recorded. Contrast sensitivity values were generally higher for the Vistech VCTS-6500 test being the difference statistically significant (p<0.001) for all the spatial frequencies. This difference was more significant for 3cpd spatial frequency and the two tests showed a better agreement for the 6cpd spatial frequency. Our results showed that there were significant differences between the VCTS-6500 and the CSV-1000 tests. Developments of some general recommendations or regulations in relation to clinical measurement of contrast sensitivity are necessary.
authors.affiliation: Centre/Department of Physics (Optometry), University of Minho, Braga, Portugal. sfranco@fisica.uminho.pt
authors.forename: Sandra
authors.initials: S
authors.lastname: Franco
authors.forename: Ana Carolina
authors.initials: AC
authors.lastname: Silva
authors.forename: Ana Sofia
authors.initials: AS
authors.lastname: Carvalho
authors.forename: Ana Sofia
authors.initials: AS
authors.lastname: Macedo
authors.forename: Madalena
authors.initials: M
authors.lastname: Lira
mesh_terms: D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D014787:Vision Tests / Q000295:instrumentation* / Q000592:standards*; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult