Raptors lack lower-field myopia
| Autor: | Christopher J. Murphy, Monica Howland, Howard C. Howland |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Male
Falconidae Buteo Zoology Kestrel Refraction Ocular Eye Birds Optics Bird medicine Myopia Animals Vision Ocular Retinoscopy biology medicine.diagnostic_test business.industry Barn-owl biology.organism_classification Body Height Sensory Systems Visual field Raptor Ophthalmoscopy Ophthalmology Accipiter cooperi Predatory Behavior Female Lower field Visual Fields business |
| Zdroj: | Vision Research. (9):1153-1155 |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/0042-6989(94)00240-M |
| Popis: | The presence of lower-field myopia (described in chickens, pigeons, quail and amphibians) allows these animals to keep the ground in focus while performing other visual tasks. A relationship has also been reported between the eye height and the degree of myopia observed. All of the animals reported in the literature to date are ground-foraging species. Using infrared neutralizing video retinoscopy and static photoretinoscopy we found a lower-field myopia to be absent in the barn owl ( Tyco alba ), Swainson's hawk ( Buteo swainsonii ), Cooper's hawk ( Accipiter cooperi ) and American kestrel ( Falco sparverius ). These findings suggest that the presence or absence of a lower-field myopia is a function of the visual ecology of the animal. |
| Databáze: | OpenAIRE |
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