**7. Conclusions**

We have developed a new eye-gaze input system for people with severe physical disabilities. This system detects the horizontal and vertical eye-gaze components of users under natural light such as that from an incandescent, fluorescent, or LED lamp. By using this system, users can input text or commands to a PC. We have also developed application programs for the eye-gaze input system, including a text input system, PC operation support system, fixedphrase mailer, Web browser, and television program viewing system. When these programs are used in combination, the QoL of ALS patients is improved.

Our eye-gaze input system can obtain the coordinates of the user's gaze point. Accordingly, when a user gazes at a point on the PC screen, the mouse cursor moves to that point. By using this input interface, users can operate the general application software of Windows. In addition, our system is expected to contribute to the development of a next-generation eyegaze input system. This new eye-gaze input system will be developed using our new method for eye-gaze and eye-blink detection. We believe that our new eye-gaze input system can ameliorate the QoL of ALS patients.
