Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/2626
metadata.dc.type: Artigo de Periódico
Issue Date: Jun-2011
metadata.dc.creator: CRUZ, Eduardo Oswaldo
DINIZ, Cristovam Wanderley Picanço
SILVEIRA, Luiz Carlos de Lima
Title: Single-pass measurement of the optical quality of the opossum eye
Citation: OSWALDO-CRUZ, Eduardo; PICANCO-DINIZ, Cristovam W.; SILVEIRA, Luiz Carlos L. Single-pass measurement of the optical quality of the opossum eye. Psychology & Neurosciences, Rio de Janeiro, v. 4, n. 1, p. 7-9, jun. 2011. Disponível em: <http://www.scielo.br/pdf/pn/v4n1/02.pdf>. Acesso em: 03 abr. 2012. <http://dx.doi.org/10.3922/j.psns.2011.1.002>.
Abstract: This paper reports the results that are part of a series of experiments designed to evaluate aspects of the spatial resolution of the visual system of the opossum, Didelphis marsupialis aurita. This nocturnal marsupial presents a well-developed eye, displaying features that reflect specialization for operation at low levels of luminosity. The species was shown to be slightly myopic, a feature that may prove to be valuable because of the increased depth of field. Opossum visual acuity has been previously evaluated by means of determining the Contrast Sensitivity Function (CSF). The results indicate rather poor visual acuity compared with other nocturnal animals. In this paper, we describe the results obtained for the optical quality of the opossum's eye using a single-pass method. The results suggest that the opossum's optical system is capable of forming images that can be resolved when separated by an angular distance on the order of 6 minutes of arc.
Keywords: Sensibilidade de contraste (Visão)
Qualidade ótica
ISSN: 1983-3288
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - ICB

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