Digital guidance systems hold great potential for supporting visually impaired individuals in their orientation and mobility (O&M). Despite advances in assistive technologies, many systems fail to adequately reflect possible user requirements. This study aims to synthesize and assess requirements for the design and implementation of digital guidance systems that align with user needs. A systematic literature review identified 25 potential requirements for such systems. These requirements were then validated through expert interviews employing a Likert-style scale. The findings highlight the importance of user independence and the role of secondary devices in complementing primary mobility aids like the white cane. The results emphasize adaptability, simplicity, and the inclusion of personalized information delivery. By integrating these guidelines, future systems can better address user needs and enhance accessibility in diverse environments. This work contributes to the field of assistive technology by providing insights regarding functional requirements for the development of effective digital guidance systems.