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Updated: Oct 20, 2025
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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
604
Exploration of dynamic text presentations in bilateral central vision loss
Brittany Bowman1, Nicole C Ross1, Peter J Bex1,2
1New England College of Optometry, Boston, Massachusetts, USA.
Summary
Dynamic text presentation methods like rapid serial visual presentation (RSVP) and scrolling text show promise for improving reading in central vision loss (CVL). However, simulated CVL results did not generalize to patients with actual CVL.
Area of Science:
- Ophthalmology and Vision Science
- Human-Computer Interaction
- Rehabilitation Engineering
Background:
- Central vision loss (CVL) significantly impairs reading ability due to the loss of foveal fixation.
- Dynamic text presentation methods, such as rapid serial visual presentation (RSVP) and scrolling text, aim to mitigate reading difficulties by reducing the need for precise eye movements.
- Understanding the efficacy of these methods in individuals with CVL is crucial for developing effective assistive technologies.
Purpose of the Study:
- To compare the effectiveness of rapid serial visual presentation (RSVP) and horizontal scrolling text on reading rate and reading acuity in individuals with central vision loss (CVL).
- To evaluate these dynamic text presentation methods in both CVL observers and normally-sighted controls with simulated CVL (simCVL).
Main Methods:
- Central scotomas and preferred retinal loci (PRL) were characterized in 11 CVL observers using MAIA microperimetry.
- 16 simCVL controls used inferior eccentric viewing, monitored by an eye-tracker.
- Reading rate and acuity were assessed using various font sizes (0.50-1.30 logMAR) with both monocular and binocular viewing conditions for CVL observers, and binocularly for simCVL controls.
Main Results:
- SimCVL controls exhibited significantly faster reading rates with RSVP compared to scrolling text (p < 0.0001).
- CVL patients showed no significant differences in binocular reading rate between RSVP and scrolling text (p = 0.25).
- Reading acuity decreased with increasing PRL eccentricity for both RSVP and scrolling, and RSVP reading rate also declined significantly with eccentricity (p = 0.02).
Conclusions:
- Simulated CVL results, showing a benefit of RSVP over scrolling, may not accurately reflect the reading performance of individuals with pathological CVL.
- Dynamic text presentation methods require further investigation and adaptation for effective use in real-world CVL populations.
- PRL characteristics significantly influence reading performance, underscoring the need for personalized assistive strategies.
Keywords:
central scotomagaze contingent scotomalow visionmacular degenerationreadingsimulated scotomaMore Related Videos
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