5  | LIMITATIONS
There are still some limitations in this meta-analysis, firstly, due to the novelty of IVR technology, there are fewer high-quality randomized controlled trials based on IVR technology, and the intervention time is not very long, so the sample size of the included studies is relatively small, and a large number of studies will be needed in the future to explore the effects of the long-term interventions; secondly, only literature published in both Chinese and English was included, which is limited in number, and may be limiting for the comprehensiveness of the results; thirdly. Most of the IVR devices were not developed and designed specifically for breast cancer patients and may not have fully realized their intervention effects; fourth, some studies reported that some patients experienced screen sickness symptoms such as nausea, vomiting, and vertigo16 and claustrophobia in some patients17. Fourth, some studies have reported that some patients experienced screen sickness such as nausea, vomiting and vertigo, and some experienced claustrophobia.