Focusing and accommodation in the brown kiwi (Apteryx australis)

Howland, Howard C., Howland, M., & Schmid, Katrina L. (1992) Focusing and accommodation in the brown kiwi (Apteryx australis). Journal of Comparative Physiology A: sensory, neural, and behavioral physiology, 170(6), pp. 687-689.

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Brown kiwis are an endangered species of nocturnal, flightless birds which are native to New Zealand. The resting focus of two specimens has previously been studied by retinoscopy in a zoo while the birds were restrained by their keeper (Sivak and Howland 1987). Those birds appeared to be hyperopic (farsighted) by 2-7 D. In this study, examination with infrared photorefraction of the focusing of two unrestrained, feeding birds showed that they could focus objects at infinity and objects in their immediate environment and that they had modest powers of accommodation. Measurements on two 6 month old kiwi chicks showed their corneal radius of curvature to be between 2.90 and 3.00 mm (117 D and 101 D in power).

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5 citations in Web of Science®

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ID Code: 4155
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: Brown kiwi, Apteryx australis, Accommodation, Photorefraction, Corneal curvature
DOI: 10.1007/BF00198978
ISSN: 1432-1351
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 1992 Springer
Copyright Statement: The original publication is available at SpringerLink
Deposited On: 15 Jun 2006 00:00
Last Modified: 31 May 2016 23:37

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