The book "Gaze Strategies and Audiovisual Speech Enhancement" by Astrid Yi offers a comprehensive examination of techniques for improving speech intelligibility in individuals with hearing loss. It explains how visual information, particularly observing a speaker's face, can significantly enhance the quality of acoustic signals. The dissertation analyzes quantitative relationships between speech intelligibility and gaze patterns in normally hearing individuals. The aim is to develop strategies that enable hearing-impaired individuals to optimize their audiovisual speech perception. The research findings indicate that the integration of visual and acoustic information is crucial for improving communication ability. This academic book is aimed at researchers, practitioners, and students engaged in audiology, speech therapy, and related disciplines.