Avian Ophthalmology
نویسنده
چکیده
Avian ophthalmology Free ranging birds are highly dependent on accurate vision in order to capture prey and forage, to avoid predators, and to find suitable perches and shelter. Perfect, or near-perfect, ocular health is imperative to survival for most free living avian species. While perfect vision is less vital for the captive companion parrot, it is nevertheless important to recognize and treat ocular disease for the overall health and comfort of the bird. Reported prevalence of ocular disease in birds ranges from 7.6% to up to 26% in birds of prey.
منابع مشابه
Tectal projection of displaced ganglion cells in avian retina.
Labeled displaced ganglion cells (DGC's) were observed in chick embryos (day 12 to 18) and hatchings following discrete tectal injections of horseradish peroxidase (HRP). Average DGC diameter was 10 to 15 mu, approximately twice the size of orthotopic ganglion cells. Six to 12 DGC's were found per 15 mu section. These findings conclusively demonstrate a tectal projection for the DGC.
متن کاملEffects of experimentally induced ametropia on the morphology and optical quality of the avian crystalline lens.
PURPOSE To examine the effects of refractive error on avian lens morphology and optical quality. METHODS Hatchling white leghorn chicks were unilaterally goggled for 7 days with either a form-deprivation goggle (n = 12), a -10 D defocus goggle (n = 12), or a +10 D defocus goggle (n = 12) to induce myopia and hyperopia. Optical quality of lenses (focal length and focal length variability) from...
متن کاملGenesis of light-induced avian glaucoma.
R E F E R E N C E S 1. Boddington, M. M., and Spriggs, A. I.: The epithelial cells in megaloblastic anemias, J. Clin. Pathol. 12: 228, 1959. 2. Theodore, F. H.: In: Modern Trends in Ophthalmology. London, 1955, Butterworth, p. 98. 3. Norn, S.: Cytologic examinations of conjunctiva in practice using the quantitative pipette method, Acta Ophthalmol. 40: 206, 1962. 4. Duke-Elder, S.: System of Oph...
متن کاملFine structure of the choroidal coat of the avian eye. Lymphatic vessels.
PURPOSE To clarify the fine structure of the avian choroid and thus help explain the mechanisms for normal and abnormal eye function and growth. METHODS Eyes from normal chickens and from experimental chickens subjected to unilateral paracentesis were fixed either by perfusion or in situ, with or without post-fixation by microwave irradiation, and then processed for light and electron microsc...
متن کاملA case report of fowl plague keratoconjunctivitis.
A case of human fowl plague keratoconjunctivitis occurred after accidental laboratory exposure. The conjunctivitis was characterised by follicle formation and a mucopurulent discharge, and ran a self-limiting course over two weeks. The keratitis was of an unusual type and consisted of small intraepithelial opacities, which appeared after one week and resolved completely over the next three week...
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