Metropsis: contrast sensitivity function test

The Contrast Sensitivity Function test measures a range of spatial frequencies. Contrast thresholds can be measured using a choice of standard psychophysical procedures. A flexible range of options are provided, based upon existing contrast sensitivity function literature and customer requests, designed to meet the needs of most researchers measuring basic visual function.

Flexible

All of the test and stimulus parameters are configurable, providing the investigator with a comprehensive set of options to suit different applications.

A Wizard helps define every aspect of the test, including calibration of the display, selection of the stimulus type and its parameters, and the design of the test protocol.

Credible

Tried and tested psychophysical procedures are used to vary the contrast of the stimulus automatically during the test. All of the test method’s internal parameters are available for inspection during the test and are displayed on a trial by trial basis. They can also be saved with the test results for later review.

Results

The results are presented on a clear graph, which shows both the data points and the fitted curve. To help compare results from multiple trials and different subjects and to quickly determine changes over time, data sets can be overlaid on the same graph. Graphs and data tables can be printed to provide a hard copy of the results. The data points can also be exported to a file for further statistical analysis in third-party software.

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