Psychophysical evidence for losses in rod sensitivity in the aging visual system.
Vision Res
; 37(4): 475-81, 1997 Feb.
Article
em En
| MEDLINE
| ID: mdl-9156178
ABSTRACT
Rod sensitivity was measured with a criterion-free psychophysical method at 10 deg in the horizontal meridian of the nasal field of the left eye on 26 young (mean age, 24.1 yr) and 14 older (mean age 72.6 yr) observers in good ocular health. A 1 deg, 90 msec stimulus was delivered by means of a free-viewing optical system under computer control. Stimulus wavelengths were chosen to have either significant (406 nm) or minimal (560 nm) absorption by the older lens. After correction for senile miosis and lens density, 0.39 log unit higher thresholds for the older observers remained and are interpreted as being due to neural factors.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Limiar Sensorial
/
Envelhecimento
/
Células Fotorreceptoras Retinianas Bastonetes
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Vision Res
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Estados Unidos