July 2013
Volume 13, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   July 2013
Rapid Assessment of Contrast Sensitivity with Mobile Touch-screens
Author Affiliations
  • Jeffrey B. Mulligan
    NASA Ames Research Center
Journal of Vision July 2013, Vol.13, 270. doi:10.1167/13.9.270
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      Jeffrey B. Mulligan; Rapid Assessment of Contrast Sensitivity with Mobile Touch-screens. Journal of Vision 2013;13(9):270. doi: 10.1167/13.9.270.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The availability of low-cost high-quality touch-screen displays in modern mobile devices has created opportunities for new approaches to routine visual measurements. Here we describe a novel method in which subjects use a finger swipe to indicate the transition from visible to invisible on a grating which is swept in both contrast and frequency. Because a single image can be swiped in about a second, it is practical to use a series of images to zoom in on particular ranges of contrast or frequency, both to increase the accuracy of the measurements and to obtain an estimate of the reliability of the subject. Sensitivities to chromatic and spatio-temporal modulations are easily measured using the same method. We will demonstrate a prototype for Apple Computer's iPad/iPod/iPhone family of devices, implemented using an open-source scripting environment known as QuIP (QUick Image Processing, http://scanpath.arc.nasa.gov/quip/).

Meeting abstract presented at VSS 2013

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