Single-pass measurement of the optical quality of the opossum eye
Psychol. neurosci. (Impr.)
;
4(1): 7-9, Jan.-June 2011. ilus
Artigo
em Inglês
| LILACS
| ID: lil-604529
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.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Gambás
/
Sensibilidades de Contraste
/
Acuidade Visual
Limite:
Animais
Idioma:
Inglês
Revista:
Psychol. neurosci. (Impr.)
Assunto da revista:
Neurologia
/
Psicologia
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal do Pará/BR
/
Universidade Federal do Rio de Janeiro/BR
Similares
MEDLINE
...
LILACS
LIS