Research Issues in Designing Improved Eye Gaze Based Hci Techniques for Augmentative and Alternative Communication

Augmentative and Alternative communication (AAC) refers to the domain of communicating methods or techniques that provide improved human-human or human-system interaction. AAC techniques enable users with certain communication disabilities to participate in everyday conversations with or without helpers. Eye gaze is a very significant area of human computer interaction (HCI). The gaze estimation and detection is used for understanding, processing and executing different commands from a distinct location. An effective eye gaze detection and estimation can help to develop improved AAC devices for better interactive communication. In this research paper an extensive research study has been carried out to understand the domain of AAC and to explore the significance of eye gaze based methods for designing better AAC systems. The objective of this research study is to identify and utilize eye gaze models for developing better and more effective AAC devices. It has been observed that eye gaze based models are being used in various fields for AAC. Certain limitations and research issues related to the performance and effectiveness of these models have been discussed. This study shall highly be useful for further research in this domain.