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Titolo:
Spatial and temporal vision in patients treated for bilateral congenital cataracts
Autore:
Ellemberg, D; Lewis, TL; Maurer, D; Lui, CH; Brent, HP;
Indirizzi:
McMaster Univ, Dept Psychol, Hamilton, ON L8S 4K1, Canada McMaster Univ Hamilton ON Canada L8S 4K1 ol, Hamilton, ON L8S 4K1, Canada Hosp Sick Children, Toronto, ON M5G 1X8, Canada Hosp Sick Children Toronto ON Canada M5G 1X8 Toronto, ON M5G 1X8, Canada Univ Toronto, Toronto, ON, Canada Univ Toronto Toronto ON CanadaUniv Toronto, Toronto, ON, Canada
Titolo Testata:
VISION RESEARCH
fascicolo: 20, volume: 39, anno: 1999,
pagine: 3480 - 3489
SICI:
0042-6989(199910)39:20<3480:SATVIP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONTRAST SENSITIVITY FUNCTION; HUMAN INFANTS; VISUAL DEPRIVATION; FORM DEPRIVATION; CHILDREN; ACUITY; MONKEYS; AMBLYOPIA; FREQUENCY;
Keywords:
children; visual deprivation; binocular congenital cataract; spatial contrast sensitivity; grating acuity; temporal contrast sensitivity; critical flicker fusion frequency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Lewis, TL McMaster Univ, Dept Psychol, 1280 Main St W, Hamilton, ON L8S 4K1, Canada McMaster Univ 1280 Main St W Hamilton ON Canada L8S 4K1 , Canada
Citazione:
D. Ellemberg et al., "Spatial and temporal vision in patients treated for bilateral congenital cataracts", VISION RES, 39(20), 1999, pp. 3480-3489

Abstract

Using the method of limits, we measured spatial and temporal vision in 13 children who had been deprived of patterned visual input during infancy until they were treated for dense central cataracts in both eyes. Spatial vision was assessed with vertical sine-wave gratings, and temporal vision was assessed with an unpatterned luminance field sinusoidally modulated over time. Under these testing conditions, spatial contrast sensitivity at low and medium spatial frequencies (0.33-2 c deg(-1)) was within normal limits, butsensitivity at higher spatial frequencies and grating acuity were reduced on average by 1.3 and 0.5 log units, respectively. Temporal vision was affected less severely, with losses in sensitivity only for low temporal frequencies (5 and 10 Hz), which averaged 0.4 log units. Thus, spatial and temporal vision are likely mediated by different neural mechanisms, that are differentially affected by deprivation. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 17:56:21