Tools for Vision Science > Measuring Visual Functions
The Cambridge Colour Test for ViSaGe provides a rapid means of screening subjects for colour vision deficiencies. It can also be used to examine in more detail the changes in colour discrimination that occur as a result of congenital or acquired conditions. The test was developed by Professor John Mollon and his colleagues (Department of Experimental Psychology, University of Cambridge) and determines discrimination ellipses in colour deficient subjects by probing chromatic sensitivity along the colour confusion lines.
The Visual Psychophysics Engine is a versatile software tool for ViSaGe that was developed by Dr Neil Parry (Clinical Vision Scientist, The University of Manchester). It is supplied with a suite of pre programmed experimental paradigms which allow you to measure luminance and chromatic Contrast Sensitivity Functions, increment thresholds and De Lange curves. You can also create your own bespoke protocols and present standard visual stimuli like sinewave gratings and Gabor patches using the easy-to-use, menu-driven interface.
Precise, repeatable, low cost psychophysical measurements
Metropsis is a complete test suite suitable for clinical research, applied vision research, drug trials, screening, sports science and human factors research.
Test protocols include:
Contrast sensitivity function