case_images: PMC11743676_01
case_images: PMC11743676_02
case_images: Two of the photographs used by CVI Scotland when attempting to create a simulation of simultanagnosia.
case_images: fnhum-18-1496811-g001.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g001.jpg
case_images: fig1
case_images: Case 1, when viewing the image of the field on the left (see Figure 1), remarked that she could "study the buildings at the back of the image and they become clearer" and felt that she had seen "every element in the photo: grass, hedges, trees, buildings, and sky."
case_images: The application of a filter to cover areas that were not perceived, demonstrating an initial attempt at simulating simultanagnosia. Note that while the content inside the hoops was also not perceived, at that stage the significance of this was not yet recognized, and thus it was not initially covered.
case_images: fnhum-18-1496811-g002.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g002.jpg
case_images: fig2
case_images: What was not seen by Case 1 in the images was covered with a fog filter (Figure 2).
case_images: A representative still image from each video, showcasing the typical content and complexity level. The references (A-F) align with the video descriptions in Table 1.
case_images: fnhum-18-1496811-g003.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g003.jpg
case_images: fig3
case_images: St Andrews Schools of Medicine and Computer Science partnered with the NGO CVI Scotland. Six short videos depicting everyday scenarios with varying degrees of complexity and movement, aiming to simulate simultanagnosia in a dynamic context, were created (Table 1 and Figure 3).
case_images: Images from the Shop (A) and Beach (C) videos with the added simultanagnosia simulation filter, showing the greater area of vision described on the open beach.
case_images: fnhum-18-1496811-g004.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g004.jpg
case_images: fig4
case_images: To simulate this experience, a "fogging" filter was dynamically applied, to cover the areas of the image that had not been reported (Figure 4). With the filter, he was able to watch the entire video, remarking, "I can see everything." When asked to compare the filtered and unfiltered versions (Figure 4), he said, "not that much difference to be honest." Upon pausing the video at the end, he acknowledged the grey fogging effect, noting, "my mind maps images, so at some point during filming I've looked away from the center ... there is a large grey color that cut out a large portion of the screen." He confirmed he only noticed the filter when looking away from the center, and when asked to focus on the paused image, he said he could see "a bit of it [the grey fog] on the edges when I look at the center, but only slightly."
case_images: The right image is the still image from the end of the Shop (A) video. The right image is the same picture with the filter applied.
case_images: fnhum-18-1496811-g005.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g005.jpg
case_images: fig5
case_images: This still image, displayed on a laptop screen, was sufficient to provoke a startle response in Case 3, who grimaced and instinctively moved their head away from the screen. Despite the slight 'softening' effect of the blur, the image remained difficult for Case 3 to visually process, as indicated by her reaction.
case_images: fnhum-18-1496811-g006.jpg
case_images: PMC11743676_02_fnhum-18-1496811-g006.jpg
case_images: fig6
case_images: Shop (A): As the video was being set up, a slightly blurred, still image of shop displays appeared on the screen (Figure 6).