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Inter-ocular temporal asynchrony (IOTA): psychophysical measurement of inter-ocular asymmetry of visual latency

Carkeet, Andrew D., Wildsoet, Christine F., & Wood, Joanne M. (1997) Inter-ocular temporal asynchrony (IOTA): psychophysical measurement of inter-ocular asymmetry of visual latency. Ophthalmic and Physiological Optics, 17(3), pp. 255-262.

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Abstract

Ocular pathology can be associated with inter-ocular asymmetry of conduction latency. We describe a relatively low-cost psychophysical method of quantifying this asymmetry of delay, an 'inter-ocular temporal asynchrony' (IOTA) system. Testing of 28 visually normal young adults gave IOTA results with a mean of 0.11 ms (SD +/- 2.4 ms). These results correspond to 95% confidence limits of -4.6 ms and +4.8 ms. Inter-ocular differences in retinal illumination, induced by using monocular neutral density filters in visually normal subjects, significantly affected IOTA in accord with an imposed perceptual delay in the 'filtered eye'. This demonstration that the IOTA technique is capable of detecting induced asymmetry of perceptual delay in visually normal subjects, along with the small measured confidence limits reported above, suggests that the apparatus should be capable of detecting inter-ocular asymmetries in response latencies with ocular disease, which have been previously measured by other techniques.

Impact and interest:

2 citations in Scopus
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2 citations in Web of Science®

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ID Code: 11882
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
DOI: 10.1111/j.1475-1313.1997.83.x
ISSN: 0275-5408
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optical Technology (111302)
Divisions: Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1997 Blackwell Publishing
Deposited On: 14 Jan 2008
Last Modified: 22 Apr 2010 03:00

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