Titre : | The Effect of Simulated Central Field Loss on Street-crossing Decision-Making in Young Adult Pedestrians |
Type de document : | article de périodique |
Auteurs : | Essam S. Almutleb ; Shirin E. Hassan |
Année de publication : | 2020 |
Langues : | Français (fre) |
Descripteurs (mots clés) : | [Thésaurus Mesh]Acuité visuelle [Thésaurus Mesh]Dégénérescence maculaire [Thésaurus Mesh]Marche à pied [Thésaurus Mesh]Prise de décision [Thésaurus Mesh]Troubles de la vision [Thésaurus HELB]:Paramédical:Piétons
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Mots-clés : | eccentric viewing central field loss |
Résumé : | SIGNIFICANCE: This study explored the street-crossing decision-making performance of young normally sighted
subjects with simulated central field loss (CFL). The results suggest that using eccentric viewing enables a person
to make safe and reliable street-crossing decisions.
PURPOSE: This study tested the hypothesis that, as the diameter of an experimentally induced central scotoma
increases, the accuracy and reliability of street-crossing decisions worsen.
METHODS: Street-crossing decisions were measured in 20 young subjects aged between 23 and 31 years while
monocularly viewing a nonsignalized, one-way street for different vehicular arrival times. Using a 5-point rating
scale, subjects judged whether they could cross the street before vehicular arrival with habitual vision and simulated CFL with eccentric viewing. The CFL was induced using soft contact lenses with different central opaque diameters. Using receiver operating characteristic curve analysis, we obtained subjects' accuracy (amount of time in
seconds where subjects either overestimated or underestimated vehicular arrival time relative to their actual crossing time) and reliability (how quickly subjects transitioned from judging insufficient to sufficient time to cross relative to their actual crossing time).
RESULTS: The centrally opaque contact lenses induced central scotomata with a mean (standard deviation) diameter of 17.12° (5.83°). No significant difference in street-crossing accuracy (P = .35) or reliability (P = .09) was
found between the normal, habitual vision and simulated CFL conditions. No statistically significant correlations
were found between scotoma diameter and the accuracy and reliability of subjects' street-crossing decisions
(P = .83 and P = .95, respectively).
CONCLUSIONS: The findings of this study suggest that adopting eccentric viewing enables a person to successfully mitigate the negative effects of an absolute central scotoma on the accuracy and reliability of their streetcrossing decisions.
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En ligne : | https://journals.lww.com/optvissci/Fulltext/2020/04000/The_Effect_of_Simulated_C [...] |
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