INTRODUCTION: Hearing and vision impairments are prevalent among residents in long-term care settings. Hearing and vision impairments frequently go unsupported, affecting residents' quality of life and healthcare costs. This paper describes the protocol for a pre-post evaluation and process evaluation of a pragmatic sensory support intervention (SSI) that was developed with residents, informal caregivers and long-term care workers. METHODS AND ANALYSIS: A prospective pre-post-intervention trial within long-term care will be conducted, including three groups: residents (n = 87), informal caregivers (n = 87) and long-term care workers (n = 40). Outcome measures include health-related quality of life and well-being measures relevant to each group measured at baseline, 3- and 6-months post-intervention. Health resource and sensory device utilisation will be captured from routine data and by direct observation. Qualitative interviews, including a representative sample of residents and informal caregivers, will be conducted as part of a simultaneous process evaluation. Generalised linear models and paired t-tests will be used to evaluate the effects on residents' and caregivers' quality of life and sensory device use. The cost-effectiveness of the intervention will be examined using within-trial analysis, economic modelling and budget impact assessment. A process evaluation will use descriptive statistics and thematic analysis to assess the intervention's reach, adoption, implementation, acceptability, mechanisms of change and contextual influences. CONCLUSION: Hearing and vision impairments are common but under-supported in older adults in long-term care. This protocol involves a systematic evaluation of the effectiveness and implementation challenges of a pragmatic SSI to optimise hearing and vision function and improve the quality of life for long-term care residents and their caregivers.