Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/17108
Título: | The effect of retinal image slip on peripheral visual acuity |
Autor(es): | Macedo, António Filipe Crossland, Michael Rubin, G. S. |
Palavras-chave: | Eye movements Visual acuity Peripheral retina Crowding Retinal image slip |
Data: | 1-Nov-2008 |
Editora: | Association for Research in Vision and Ophthalmology (ARVO) |
Revista: | Journal of Vision |
Resumo(s): | Retinal image slip promoted by fixational eye movements prevents image fading in central vision. However, in the periphery a higher amount of movement is necessary to prevent this fading. We assessed the effect of different levels of retinal image slip in peripheral vision by measuring peripheral visual acuity (VA), with and without crowding, while modulating retinal image slip by using gaze-linked stimuli. Measurements were carried out at four isoeccentric positions at 5 and at 10 degrees eccentricity. Gaze position was monitored throughout using an infrared eyetracker. The target was presented for up to 500 msec, either with no retinal image slip, with reduced retinal slip, or with increased retinal image slip. Without crowding, peripheral visual acuity improved with increased retinal image slip compared with the other two conditions. In contrast to the previous result, under crowded conditions, peripheral visual acuity decreased markedly with increased retinal image slip. Therefore, the effects of increased retinal image slip are different for simple (noncrowded) and more complex (crowded) visual tasks. These results provide further evidence for the importance of fixation stability on complex visual tasks when using the peripheral retina. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/17108 |
DOI: | 10.1167/8.14.16 |
ISSN: | 1534-7362 |
Versão da editora: | http://www.journalofvision.org/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - OCV - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Macedo,Crossland&Rubin,JOV(2008)_The effect of retinal image slip on peripheral visual acuity.pdf | Documento Principal | 631,45 kB | Adobe PDF | Ver/Abrir |