  Reading is a challenging task for low vision people. While conventional low
vision aids (e.g., magnification) offer certain support, they cannot fully
address the difficulties faced by low vision users, such as locating the next
line and distinguishing similar words. To fill this gap, we present GazePrompt,
a gaze-aware reading aid that provides timely and targeted visual and audio
augmentations based on users' gaze behaviors. GazePrompt includes two key
features: (1) a Line-Switching support that highlights the line a reader
intends to read; and (2) a Difficult-Word support that magnifies or reads aloud
a word that the reader hesitates with. Through a study with 13 low vision
participants who performed well-controlled reading-aloud tasks with and without
GazePrompt, we found that GazePrompt significantly reduced participants' line
switching time, reduced word recognition errors, and improved their subjective
reading experiences. A follow-up silent-reading study showed that GazePrompt
can enhance users' concentration and perceived comprehension of the reading
contents. We further derive design considerations for future gaze-based low
vision aids.
