Single-pass measurement of the optical quality of the opossum eye
Psychol. neurosci. (Impr.)
; 4(1): 7-9, Jan.-June 2011. ilus
Article
em En
| LILACS
| ID: lil-604529
Biblioteca responsável:
BR85.1
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.
Palavras-chave
Texto completo:
1
Base de dados:
LILACS
Assunto principal:
Gambás
/
Sensibilidades de Contraste
/
Acuidade Visual
Limite:
Animals
Idioma:
En
Revista:
Psychol. neurosci. (Impr.)
Assunto da revista:
NEUROLOGIA
/
PSICOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Brasil