Despite the recent advancements in the development of accessible musical interfaces for individuals with limited motor capabilities such as quadriplegia, DJ-ing still remains a relatively inaccessible musical activity. To address this issue, we propose the design and implementation of DJeye, an eye tracking-based software interface which allows typical basic mixing operations such as crossfading, filtering, looping, track seeking, and more. The interface is founded upon established design principles for gaze-based musical interfaces, and introduces specific eye interaction methods involving winking. Although currently in a prototype stage, we conducted case studies to evaluate the proposed interaction methods and explore which functions may be of interest to end-users. The study was conducted with the participation of amateur DJs, who were subjected to interviews, think-alouds, and questionnaires. The results of the case studies are analyzed in the paper to provide insights into future directions and developments.