Impact of age‐related macular degeneration on object searches in realistic panoramic scenes

Thibaut, Miguel; Tran, Thi-Ha-Chau; Szaffarczyk, Sébastien; Boucart, Muriel

doi:10.1111/cxo.12644

Cited by 10 publications

(18 citation statements)

References 65 publications

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“…27,42,43 Patient-based studies 25,28,44 with realistic visual search tasks are gaining more interest because of their resemblance to tasks that patients have to face in daily life. 19,25,28 The present results can be summarised as follows. (1) Object search performance is affected by ageing, with a decrease in accuracy (13.5 per cent) and an increase in search time (46 per cent) for older compared to younger normally sighted participants.…”

Section: Discussionmentioning

confidence: 75%

“…7,11 The quality of life National Eye Institute Visual Function Questionaire-25classically used in clinical assessment of the quality of life of a patientis not AMD-specific. Other outcome measures include computer-based task-performance [12][13][14][15][16][17][18][19][20][21][22][23][24] and real-world visual tasks that AMD patients accomplish every day. 25 Visual search is a frequent task in daily life.…”

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confidence: 99%

“…26 Using real-world visual search tasks, visual search has been shown to be impaired in those with low vision. 12,14,19,25,27,28 In self-reported quality of life questionnaires, AMD patients report difficulties in searching and finding things on a crowded shelf, suggesting that the spatial proximity of elements may have an impact on object search. 29 In natural environments, objects are usually surrounded by other objects (for example, on shelves of the supermarket or at home: books, clothes, food, and so on), sometimes occluded, rendering visual search even more difficult.…”

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confidence: 99%

“…Errors were mainly due to false alarms resulting from confusion between the target object and another structurally similar object present in the scene. 19 Adaptive strategies, such as eccentric viewing and steady eye strategy, may be used to compensate for central vision loss secondary to AMD. 33 This preferred retinal locus for eccentric viewing is a well-defined retinal area used for fixation.…”

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confidence: 99%

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Object search in neovascular age‐related macular degeneration: the crowding effect

Thibaut

Boucart

Tran

2020

Clinical and Experimental Optometry

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Background Visual search, an activity that relies on central vision, is frequent in daily life. This study investigates the effect of spacing between items in an object search task in participants with central vision loss. Methods Patients with neovascular age‐related macular degeneration (AMD), age‐matched controls, and young controls were included. The stimuli were displays of four, six and nine objects randomly presented in a ‘crowded’ (spacing 1.5°) or ‘uncrowded’ (spacing 6°) condition. For each of 96 trials, participants were asked to search for a predefined target that remained on the screen until the response was recorded. Accuracy, search time, and eye movements (number of fixations and scan path ratio) were recorded. Results Compared to older controls, accuracy decreased by 31 per cent and search time increased by 61 per cent in AMD participants. Ageing also affected performance with a lower accuracy by 13.5 per cent and longer search times by 46 per cent in older compared to younger controls. Increasing the spacing between elements increased accuracy by 21 per cent in AMD participants but it had no effect in older and younger controls. Performance was not related to visual acuity or to duration of neovascular AMD, but search time was correlated to the lesion size in the ‘crowded’ condition. Conclusions Object search is ubiquitous in daily life activities. When visual acuity is irrevocably reduced, increasing the spacing between elements can reliably improve object search performance in patients.

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Section: Discussionmentioning

confidence: 75%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Object search in neovascular age‐related macular degeneration: the crowding effect

Thibaut

Boucart

Tran

2020

Clinical and Experimental Optometry

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“…Loss of central vision impairs critical real-world behaviors that benefit from high-acuity vision, such as reading and driving (Cheung & Legge, 2005). Such impairments result not only from the loss of highacuity central vision, but also a disruption in eye movements (Caldani et al, 2019;Thibaut et al, 2017). These impairments are thought to underlie deficits in goal-driven attention in patients with CVL, manifested as slower visual search especially in more naturalistic search tasks (for a review, see Crabb & Taylor, 2017).…”

Section: Introductionmentioning

confidence: 99%

Simulated central vision loss impairs implicit location probability learning

Addleman¹,

Legge²,

Jiang³

2020

Preprint

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Central vision loss (CVL) occurs in advanced forms of age-related macular degeneration (AMD). It impairs high-acuity vision and results in difficulties with oculomotor control. Goal-driven guidance of attention is less effective in people with CVL, but do central scotomas also affect implicit, experience-driven attention? We investigated how simulated central scotomas affect young adults’ ability to prioritize locations that frequently contain a visual search target (location probability learning). Experiment 1 successfully induced probability learning in a no scotoma phase, regardless of whether participants became aware of the target’s location probability. Subsequently, central scotomas were introduced using a gaze-contingent eye tracking paradigm. The previously learned spatial bias persisted for a short time in this phase, an effect that was statistically comparable for no-scotoma and scotoma testing. Experiment 2 investigated whether participants could acquire location probability learning when trained with a simulated central scotoma. Unlike Experiment 1, training with a central scotoma yielded location probability learning only in participants who were aware of the target’s location probability. This effect transferred to search with no scotoma in aware but not unaware participants. Together, the results show that simulated central vision loss interferes with the acquisition of implicitly learned location probability learning, supporting a role of central vision in implicit spatial attentional biases.

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Vision, attention, and driving

Anderson

Ghate

Rizzo

2021

Handbook of Clinical Neurology

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Impact of age‐related macular degeneration on object searches in realistic panoramic scenes

Abstract: The outcomes of the present study indicate that, under realistic conditions, although slower than age-matched, normally sighted controls, participants with AMD were able to accomplish visual searches of objects with high accuracy.

Cited by 10 publications

References 65 publications

Object search in neovascular age‐related macular degeneration: the crowding effect

Object search in neovascular age‐related macular degeneration: the crowding effect

Simulated central vision loss impairs implicit location probability learning

Vision, attention, and driving

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