Eye tracking technology has become one of the most popular techniques within the human and computer interaction (HCI) era, this is especially important

This paper presents a system of assistive technology based on video-oculography (VOG) control interfaces, namely “Ophapasai”. The system designed specifically for disabled people communicate with the people that surround them. The primary method of this system consists of a selection of pictogram buttons within the circular menu-augment on the screen, which used an inexpensive video-oculography device. The results indicate that Ophapasai was used to support a number of communication functions (100%). Furthermore, we also conducted an evaluation of performance for pointing video-oculography device with three participants of amyotrophic lateral sclerosis (ALS). The evaluation used throughput of standards for computer pointing devices as measurement of user performance in a multi-direction point and select task which found, participants can pointing and selection their overall mean throughput was 2.02 bits/s.

Thai traditional computer keyboard layouts are derived from the Thai typewriter keyboard's layout, which supports typing with ten fingers. Hence, this layout is not optimized for typing on touch screen device with one finger. This article presents a new method in arrangement the position of Thai characters on the virtual keyboard to support typing by a single finger. The process of the new method consist of analysing Thai Language to create difference digraph table from Benchmark for Enhancing the Standard of Thai language processing corpus (BEST corpus), designed keyboard layout using evolutionary computation technique and estimated time speed of typing by model human hand movement with Fitts' Law. The experiment shows that new keyboard designed by the proposed method has achieved a typing speed faster than the Thai traditional keyboard layout.