Assessment of visual acuity and contrast sensitivity in the chick using an optokinetic nystagmus paradigm

Schmid, Katrina L. & Wildsoet, Christine F. (1998) Assessment of visual acuity and contrast sensitivity in the chick using an optokinetic nystagmus paradigm. Vision Research, 38(17), pp. 2629-2634.

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While the chick is one of the widely used animal models for eye growth studies very little is known about its visual spatial resolution performance. Using optokinetic nystagmus responses as an indicator of stimulus visibility, we estimated the visual acuity of young chicks to be between 6.0 and 7.7 cycles deg-1 at 2 and 4 days of age and slightly higher, between 7.7 and 8.6 cycle deg-1, at 8 days. Contrast sensitivity measured using the same experimental paradigm was greatest at around 1.2 cycle deg-1, for which the contrast threshold lay between 4% and 11%. Sensitivity became progressively poorer for frequencies both higher and lower than this. These data suggest that the visual performance of the chick is slightly poorer than that of the pigeon which has a similar eye size and exhibits similar foraging behaviour.

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51 citations in Web of Science®
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ID Code: 4189
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal’s website (see link) or contact the author. Author contact details:
Keywords: Animals, Newborn/, physiology, Chickens/, physiology, Contrast Sensitivity/, physiology, Visual Acuity/, physiology, Animals, Nystagmus, Optokinetic, Research Support, Non, U, S, Gov't
DOI: 10.1016/S0042-6989(97)00446-X
ISSN: 0042-6989
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1998 Elsevier
Deposited On: 14 Jun 2006 00:00
Last Modified: 15 Jan 2009 07:04

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