Purpose of the article This study explored the impact of assistive technology on the well-being of legally blind adults. Materials and methods In this mixed-method study, a convenience sample of 86 legally blind adults took an electronic survey. The questionnaire was comprised of demographics, use patterns, and an instrument called TENS-Interface that measured the impact of technology on well-being categories of autonomy, competence, and relatedness. Descriptive statistics, reliability, power analysis and bivariate correlations were calculated using SPSS statistical software. Three participants completed follow up semi-structured interviews, which were analysed for themes of technological mediation using NVivo 12 software. Results The TENS-Interface was validated for use with a legally blind population. Descriptive statistics showed a higher mean for autonomy than competence or relatedness. Braille was positively correlated to both autonomy and competence, while screen reader proficiency was related to competence. Daily use of social media, email, instant messaging, and video calls were correlated to relatedness. The technological devices used by interview participants were analysed for technological mediation. Training was identified as an additional theme. Conclusions Recommendations for practice include providing training to legally blind adults in screen reader use and braille use to support well-being via competence and autonomy. Training is also recommended for this population in the use of social media, email, and video calls to promote well-being through opportunities for relatedness. Further research is recommended to explore instructional methods that are not only efficient, but also meaningful for older adults in the position of losing their vision.